“Do you have pickled pepper?”“Is silver fish(Hemisalanx prognathus Regan)available to order now?”The messages popping up on Cheng Cheng’s mobile phone give him some relief as his restaurant struggles to stay afloat financially during the COVID-19 epidemic.When he opened a group buying space on WeChat one year ago,which now has over 500 members,he never expected it would become the lifeline of his business during a sweeping epidemic.“WeChat saved my business,now all my employees are engaged in online commerce,”he said.