

TOKYO — It emerged in the central Chinese province of Henan in June that local authorities had abused an anti-COVID app to contain the movements of more than 1,300 people. Yang, who lives in Shandong Province, is one of them.
On the morning of June 13, Yang arrived on a night train at his destination, Zhengzhou, the capital of Henan. As the train approached the station, he could not believe his eyes as his “health code” smartphone app turned red.