I am concerned, though, that this is Google's way of getting around issues of not being able to operate with a free hand in China, i.e. it will serve as a platform for developing Chinese-language services and be ready to release them in the PRC when they can do so without attracting negative attention. There's some history of this -- in the 90s and 2000s it was a common strategy among global corporations to launch and iterate ideas and products in Taiwan before moving them over to China.
ETA:
Another more depressing assessment: Google is placing a bet on annexation, as the PRC has repeatedly insisted it will do by any means necessary (see "Xi Jinping Warns Taiwan That Unification Is the Goal and Force Is an Option," https://www.nytimes.com/2019/01/01/world/asia/xi-jinping-tai...)