## 4 Discussion  
In order to explore the characteristics of the public response to release-type communication to stop food waste, the study explores the changes in the public support intention and implementation intention before and after release-type communication by consideration of time and space dimensions, and further considers the public response in different regions. First of all, according to the fact that the number of comments in a period of time is significantly more than that of other periods and lasts for a period of time, which is considered to be a relatively special period [43]. As [PERSON] et al. [44] pointed out, the response of the public shows different characteristics in different periods, and the number of microblog comments, forwarding, and reading can reflect the public's attention and attention. When the number of comments at a certain stage shows the same trend and reaches the peak at a certain point, this point can be used as the dividing line of public opinion stages. The public concern after release-type communication is divided into incubation period, outbreak period, recession period, second outbreak period, and fading period, which is used to analyze the changing characteristic of the public support intention and implementation intention. The study shows that public emotional response is not invariable in five periods. Both the support intention and implementation intention appear to have had an inflection point in the recession period. The result indicates that the monitoring and analysis of the effect of release-type communication need a more fine-grained investigation, and the government can provide intervention policies during the recession period to maintain the effect of communication. Secondly, the results of empirical mode decomposition show that the public's willingness to support public communication to stop food waste gradually declines over time. [PERSON] and [PERSON] [48] proposed that individual support intention to policies was mainly influenced by positive perceptions and emotions, and individual satisfaction had a significant positive impact on support intention. In general, the more positive the public's views on the policy of reducing food waste, the stronger the individual's willingness to support the policy of reducing food waste [49; 50]. Combined with text, it is found the public initially has positive attitudes toward release-type communication to stop food waste in general. The inappropriate measures taken by local organizations in the response process have aroused dissatisfaction, which has led to a gradual decrease in support intention. Additionally, the effectiveness of the policy will decrease over time. When a policy is just released, the public will pay a high degree of attention to it [51]. However, since the topic has not been strengthened and the public's attention has shifted, the support for release-type communication to stop food waste will also decrease. Thirdly, in the analysis of spatial differences, the support intention and implementation intention are higher in West China than in East China after release-type communication. Compared with eastern regions, western regions are relatively scarce in resources, so the public in western regions may be more willing to reduce waste and save resources spontaneously. Through the comparative analysis of the public support intention and implementation intention before and after release-type communication, the public support intention decreases significantly in Beijing, Guangdong, and Fujian. The implementation intention increases significantly in Shanghai, while that in Shandong decreases significantly. Specifically, Beijing, as the political center of the country, is the first choice for the trial of measures to stop food waste, which may explain why the support intention in Beijing changes acutely. Combined with a large number of text data, the support intention changes dramatically. This may be related to some unreasonable measures causing the public's negative mood. [PERSON] et al.