A top social media agency in mainland China, suspended from business operations two years ago for selling fake Hong Kong brand mooncakes, is back in the spotlight for selling live-streaming courses. Three Sheep Network, based in eastern Anhui province, boasts top influencers Zhang Qingyan and Zhang Kaiyang, who are twin brothers. The former, better known as Crazy Younger Brother Yang, has 95 million followers, a big drop from his more than 100 million followers before the network was...