That's only on paper. During anniversaries of various politically important events, access to the foreign segment of the Internet is slowed down, infected with packet loss, and disrupted in other ways so that VPNs become practically unusable. This obviously affects not only VPNs, but other kinds of traffic.

Source: I worked for a company that had an office in China, and was responsible for maintaining the Chinese servers. In that case, I had to troubleshoot multi-hour MySQL replication lags. Solved by switching the TCP implementation to BBR, because it is resistant to packet loss.