First of all, I assume that you are asking about the development of "professional social work", then:
Development of social work education: At present, it is said that there are more than 200 colleges and universities in China offering this major. But teachers are often not social workers, and better, they are taught by teachers such as psychology, sociology and philosophy. However, there are not many students engaged in this major after graduation.
Second, the development of social work practice, Shanghai can be said to be the city that developed social work services earlier. However, since Shenzhen began to promote this work in 2007, it has been the Pearl River Delta side, especially Shenzhen, Dongguan and Guangzhou, which have made great efforts, including promoting social work services and supporting policies. Guangdong Province also established the first and only social work committee in China.