In this April 1, 2020, photo, a woman waits for her train at a subway station after entering with a green pass in Wuhan in central China's Hubei province. Life in China post-coronavirus outbreak is ruled by a green symbol on a smartphone screen. Green signifies the “health code” that says the user is symptom-free. It is required to board a subway, check into a hotel or enter Wuhan, the city where the global pandemic began. (Photo by Ng Han Guan/AP Photo)
