The European Chamber of Commerce South China Chapter has an online survey to collect data from foreign residents who are stranded abroad. The deadline is July 20:

European Chamber Members Stranded Abroad Due to Covid-19 Survey

It does ask for some personal information (name, employer, location, phone number etc.) that some people may not be willing to provide but that's a personal decision you need to make. This was sent to me with the following text:

[QUOTE]
ASSESSMENT OF PEOPLE STRANDED ABROAD TO PRESENT IT TO THE RELEVANT AUTHORITIES
The European Chamber South China Chapter is conducting a survey to understand each individual's general situation with regard to the entry ban. This survey will ask a variety of questions and can be filled out by those out of China and those who have family members outside of China or both. We will assess this information and present the data to relevant government officials to effectively find solutions to this dilemma. We encourage you to take part and fill in this survey by 20 July. Please find the survey through the link:
https://www.surveymonkey.com/r/CXKFPXY
[ENDQUOTE]