A mutant virus spread in Yunnan, China, blocking the city. All citizens are quarantined at home. A large number of residents are rushing to the PCR laboratory in Yunnan Province in southern China. A total of 20 new coronavirus infections have been confirmed earlier this week in Ruili, a city with a population of 260,000 located on the border with Myanmar. Many are thought to be the Indian mutant virus “Delta strain”. The city hurriedly required all citizens to carry out PCR tests and quarantine their homes, and blocked the entire area to ban them from entering and exiting the city. As of the 6th, 106 positives have been confirmed in Yunnan as a whole.