Wouldn’t this be due to the Lunar New Year, a massive holiday that shuts down wide swaths of the country? UPS has a bunch of Asia delays right now too.
CNY goes for two weeks and just started last Tuesday night. The golden week holiday however just ended. Most people take extra time off so things are usually slow until the whole holiday is over.
UPs refers to it as “Lunar New Year holidays” on the website I linked, probably because it’s more than just China. You’re right though, I should have been more clear.
https://www.ups.com/cn/en/service-alerts.page