A Visualized Analysis of the Research Literature on Early Childhood Family Education in China

As the most important place for preschool children to grow and learn, family has a great impact on the physical and mental development of preschool children. What is the development process and current status of early childhood family education in China? It is very necessary to visually analyze research status, hotspots and trends of Chinese early childhood family education research field. The quantitative and visual atlas of research literature provide an effective analytical approach for the development of research field. The research data is from CNKI which is the largest and most authoritative literature database in China. The research tool CiteSpace analysis software is used to conduct quantitative analysis on the source data and calculate the core authors, institutions, research hotspots and frontier. Research hotspots and frontiers in the field of early childhood family education in China calcu-lated by CiteSpace software include home-kindergarten cooperation research, rural preschool left-behind children family education research, preschool floating children family education research and preschool children parental education research. Literature content analysis as a qualitative research me-thod makes an in-depth interpretation of research hotspots and frontiers on the basis of quantitative analysis, in order to understand the status quo of Chinese early childhood family education.

The findings: A good student, a product's noble achievements after they step into the society, and he was mostly affected by good family influence and has a direct relationship. And the problem that the school students, and exposed the problems after they step into the society, can be to find root cause in the family environment and family education (Research Group, 2012). With the development of economic growth, talent competition is increasing, which leads to the emergence of utilitarian education value orientation for parents. The parents of preschool children only focus on the knowledge acquisition of preschool children and neglect the most important personality shaping at this stage (Li, 2010). In addition, with the acceleration of urbanization in China, migrant workers have become the norm to work in cities. However, the preschool family education of migrant workers has become a thorny issue that needs to be solved urgently (Du, 2006). In addition, the wrong education methods in family education of preschool children in China mainly include mental violence, over-indulgence, material stimulation and indulgence. These unscientific educational methods are not conducive to the positive development of preschool children (Guo, 2012). What is the current situation of family education for preschool children in China, what problems exist and how to solve them are the key topics of current attention of Chinese education departments. Whether the research field of family education for preschool children in China pays attention to the research issues within the subject, and what are the hotspots and frontiers of the research field? These are the reasons for the quantitative and visual analysis of the literature in this field in this paper. The aim of this paper is to make a quantitative and visual analysis of the literature of early childhood family education in China, which can clarify the development context and process of the research on early childhood family education in China, and analyzes the hot research topics and research frontiers of this field.

Data Source
The literature resources were selected from CNKI website which is the largest literature retrieval platform in China. In CNKI platform, the words "early childhood" and "family education" as the main topics, and the period was set from 2000 to 2020. A total of 736 literature were retrieved, and 542 literature were exported after the conference, newspaper, book review and other contents were excluded. Then the retrieval function of literature title, keywords and abstract was used, and the second retrieval was set to include early childhood and family education in the retrieval, and the time period was also set to 2000-2020. A total of 633 literature were retrieved, and 475 literature were retained after filtering one by one. Data cleaning was carried out for the twice retrieved and retained literatures, that is, information incomplete literatures were removed and duplicate literatures were removed. Finally, the research data was determined as 582 literature that could be analyzed.

Visual Tool
The analysis tool used in this study "CiteSpace 5.6.R5" is a literature quantitative and visual analysis software developed by Professor Chen Chaomei of Drexel University in the US. The research tool CiteSpace software is a Java application for analyzing and visualizing co-citation networks (Chen, 2006). This software can perform multi-dimensional, dynamic and time-sharing visual analysis of the structure and development dynamics of the research field. By measuring the literature (collection) of specific fields, CiteSpace explores the critical path of discipline evolution and its knowledge inflection point, and forms the analysis of the potential dynamic mechanism of discipline evolution and the exploration of the frontier of discipline development through the drawing of a series of visual maps (Chen, Chen, Liu, Hu, & Wang, 2015). The functions of CiteSpace tool mainly include author cooperative network analysis, institutional cooperative network analysis, national cooperative network analysis, subject co-occurrence analysis, keyword co-occurrence analysis, WoS database classification co-occurrence analysis, literature co-citation analysis, author co-citation analysis, journal co-citation analysis, literature coupling analysis. The exported literature data of CNKI database just preserved the literature title, author information, journal information, abstract and keywords, but did not export the reference information, so it could only carry out the first five types of analysis of the above functions.

Annual Publications Trend of Early Childhood Family
Education Papers Through the metrological analysis of the literature resources, the number of early childhood family education papers between 2000 and 2020 is presented in  From that, policy support at the national level will directly lead to an increase in the amount of academic research in that field. Thus, to a great extent, the development of Chinese academic research needs to be promoted by national macro policies.

Authors and Research Institutions Analysis
In CiteSpace interface set analysis literature fixed number of year for 2000-2020 time slice unit for one year, the network node set the author co-occurrence network analysis and institutional co-occurrence network analysis respectively. It can get the data of paper 582 most influential authors and institution co-occurrence network graph. Because of early childhood family education research field in

Keywords Co-Occurrence Analysis
Research hotspots are the research problems or topics discussed in a relatively large number of papers within a certain period of time (Qiu, Pan, & Hou, 2014). ing, running software to get the data of paper 582 keywords co-occurrence analysis graph ( Figure 2). The larger the circle figure of the node in the graph, the more frequently the corresponding keywords co-occur. The larger the node font is, the stronger the keyword centrality will be, which indicates the probability that the keyword appears with other keywords, in addition the centrality value of a node >0.1 is referred to as the critical node.
Keywords with co-occurrence times greater than 10 are sorted by co-occurrence frequency, as shown in Table 2. Combined with the analysis of keywords co-occurrence frequency and centrality in Figure 2 and Table 2, the research hotspots in the field of early childhood family education in China mainly include   Chinese urban rural polarization characteristics of geographical environment and social environment caused part of the rural preschool children follow working parents come to city to life and learning to be flow of preschool children, the other part of pre-school children are remained by migrant parents to their rural relatives especially their grandparents to study and live, which are called rural left-behind children, these two types of preschool children's family education problems worthy of attention. At present, a series of psychological and occupational safety problems of left-behind children in rural areas have become the focus of their family education (Guo, 2017). Parents also need to pay attention to the implementation of family education for floating preschool children, because children follow their parents from rural areas to study in cities, and the change of environment will have a certain psychological impact on children.

Keywords Clustering Analysis
Keywords co-occurrence frequency has certain directivity on research hotspots. From 2000 to 2020, research hotspots in the field of early childhood family education in China have emerged. However, clustering analysis of keywords is still needed to explore research topics and dig out internal relations. Cluster analysis was carried out on the interface where CiteSpace software had formed a keyword co-existing network map, and keyword clustering was selected. Under LLR algorithm, the clustering modularity index Q value was 0.5738 (Q > 0.3 significant community structure), clustering profile index S value was 0.5169 (S > 0.5 reasonable clustering) of the keyword clustering map.
The keyword clustering in Figure 3 can reflect the research topics in the field of family education for preschool Children in China mainly include preschool children education, parent education, learning in regular class, personality development, preschool floating children, early childhood education and family psychological environment.

Keywords Bursts Term Analysis
Keyword Burst Detection algorithm in CiteSpace software can track the active state and new trend of research literature data. On the basis of the completion of keyword co-occurrence and clustering graph, keyword burst detection was carried out. The algorithm and number were set as default values. The minimum burst duration was 2 years, and a total of 12 burst keywords were detected. The results of the keyword burst detection are shown in Figure 4.
There are two burst keywords near the current time, namely parenting education and parent school. It can be seen from the figure that the forefront trend of early childhood family education in China is the research on parental education of preschool children. As the caregivers of preschool children, love for their children is instinctive, but how to scientifically educate and guide children growth needs parental learning and training.   As a way to implement parental education, parent school is included in parental education for discussion.

Home-Kindergarten Cooperation Research
Home However, there are still many difficulties in home-kindergarten cooperation in China, which focuses more on the acquisition of children's subject knowledge, the cooperation route mainly through open days for parents, and the center of gravity of cooperation is inclined to the kindergarten (Cao, 2003;Yuan, 2015).
Some researchers carried out studies on home-kindergarten cooperation in developed countries, and advocated that the educational content of home-based co-parenting in China should be based on children's identity, role and relationship, surrounding environment, sports, safety, health, food and other aspects, rather than just educational cooperation of subject knowledge (Li, 2003). In ad-

Rural Preschool Left-Behind Children Family Education Research
In China, when both parents or one parent move to other regions, children are left behind in the place where they have their registered permanent residence, those below aged 6 unenrolled children who cannot live with both parents are called preschool left-behind children (Zhang & Cai, 2009). After China adopted reform and opening up, the free movement of labor force began with the purpose of seeking employment in other places. Restricted by economic conditions and the dual structure system between urban and rural areas, many peasant workers cannot enter cities to work while raising their preschool children (Wei, 2007). The peasant workers have to leave their children in the countryside and entrust others to take care of them. Therefore, most preschool left-behind children exist in rural areas in China.
In 2000 (Yang, Hu, & Yang, 2018). These providers not only provide family education guidance for rural preschool left-behind children, but also provide psychological counseling, emotional comfort, life and learning guidance, so as to alleviate a series of physical and psychological problems caused by the lack of family education for rural preschool left-behind children. In addition, the government is also making efforts for rural pre-school left-behind children to live with their parents who are peasant workers in cities, which is also another research hotspot in the field of early childhood family education in China: research on preschool floating children family education.

Preschool Floating Children Family Education Research
Preschool floating children refer to children who move to another area with their parents because their parents need to leave their place of residence due to

Preschool Children Parental Education Research
Parental education is a foreign term, in the above CiteSpace quantitative and visual analysis results can be seen in the 2011 preschool children parental education in China first appeared in the academic research literature, and beginning in 2018 to become burst keywords continues today. Therefore, parental education for preschool children has become a research hotspot and frontier in the field of family education for preschool children in China. Previously, it was widely believed that the development of habits formation, cognition improvement, character building and quality improvement of preschool children only depended on parental own experience, which was taught by words and deeds from generation to generation. It was not until the term "parental education" was introduced that people realized that parents of preschool children also need training.
Parental education refers to providing parents with knowledge and skills in parenting, with the purpose of helping parents to be effective parents, to play the role of parents successfully, to take on the responsibilities of parents, and to promote the healthy growth and development of children (Wang, 1999). Early childhood stage is a critical period for the formation of individual personality and the best period for children's social, behavioral and language development.
Parental education is the most effective strategy to prevent, intervene and reduce improper parenting and problematic behavior of preschool children (Petersson et al., 2004). Therefore, children in preschool families are regarded as the most  (Zhang, Lu, & Liu, 2019). However, parents of infants and toddlers who are not enrolled in the kindergarten do not have access to parental education. A study with a sample of 1201 parents of preschool children found that the parental education needs of parents are diversified, among which the knowledge and skills of child rearing rank first, and the cultivation of good behavior habits is the most urgent. The second is communication and adjustment needs, and parent-child interaction communication is the most urgent. Thirdly, family management needs, and family crisis management is the most urgent (Xu & Zhou, 2016). In view of the current plight and unmet educational needs of parental education for preschool children in China, The Chinese government, kindergartens, communities and parents should take positive measures to improve parental education. At the 12th National People's Congress in 2017, Cao Dewang, a member of the Chinese People's Political Consultative Conference (CPPCC), proposed to enact China's Parent Education Law, making parenting education an obligation. The main body of education implementation should not only be undertaken by kindergartens, but diversified forms of parenting education activities should be carried out through multiple channels, such as setting up community parent schools, opening family education care hotline, setting up family care promotion association, increasing parental education volunteers to provide door-to-door guidance, and using the Internet to set up online parent schools (Shu, 2020). The training of parent education workers can improve the quality of parent education, because parent educator teachers can use scientific and effective means to guide parents. Chinese Ministry of Education needs to establish the parental education instructor certification system as soon as possible, and at the same time, issue the guidance curriculum outline of parental education to provide professional personnel for parenting education.

Conclusion
In this article, CiteSpace software was used to conduct quantitative and visual analysis of research literature in the field of early childhood family education in China, and then literature content analysis was combined to understand research hotspots and frontiers in this field. The discussion part of the article has clarified that the hotspots in the field of early childhood family education in China are home-kindergarten cooperation research, rural preschool left-behind children family education research, preschool floating children family education research and preschool children parental education research.
Among them, the main problem in home-kindergarten cooperation in China is that the relationship between parents and kindergartens is not equal. Parents are mostly required to be the coordinators and bystanders of kindergartens. In The Incredible Years and Triple P Positive Parenting Program (Fan, 2016), the government, the community, kindergartens and parents of children work together to provide development opportunities for parenting education of preschool children in China.