Originally Posted by
narvik
So, it's starting on March 21st (not 17th, as everyone had predicted):
Flights to Shanghai from abroad to be diverted
More than 100 international flights to Shanghai will be diverted to one of a dozen different domestic airports beginning March 21 to help relieve the city's recent COVID-19 prevention pressure.
The 106 flights to be diverted are on 22 routes operated by five domestic airlines – Air China, China Eastern, Shanghai Airlines, Juneyao and Spring, the Civil Aviation Administration of China ( CAAC) announced on Tuesday.
https://www.shine.cn/news/metro/2203153131/
Not sure if you have looked into the UA 858 PVG-ICN-SFO. I flew on Feb 28 when UA 857 was not carrying passengers (just cargo). The oubound flight from China to the US can still carry passengers.
May be the diversion won't impact the inbound cargo flight.