Official account of WeChat, Shenzhen Municipal Health and Wellness Committee. The official account of WeChat, Shenzhen Health and Wellness Committee, can receive masks for free. Shenzhen, referred to as "Shenzhen" or Pengcheng for short, is a sub-provincial city, a city under separate state planning, a megacity in Guangdong Province, a China Special Economic Zone approved by the State Council, a national economic center city and an international city.