Originally Posted by
narvik
https://chinatravelnews.com/article/171420
(also on Bloomberg, but this link isn't behind a paywall)
"United Airlines Holdings Inc. has delayed plans to add extra US-China flights by at least six months, according to a person with knowledge of the matter, as the two nations remain deadlocked over lifting Covid flight caps. The increase in flights was originally slated to start late next month, but the move was postponed over the weekend, said the person, who isn’t authorized to speak because the matter is private. The airline has started to inform affected passengers, they added."
Cached Bloomberg article:
https://archive.is/KwGI2
The article doesn't specify the reason for the breakdown in talks, but rumors elsewhere suggest it's a combination of (1) unhappiness from both sides about pre-departure testing requirements, and (2) US unhappiness about Chinese carriers being able to overfly Russia.