Ask HN? Which tech stacks are popular in China?

A lot of big/small companies in North America/India etc are pretty open about their tech stacks and engineering practices. I couldn't find too much about the tech stacks of the companies in China. Alibaba has a few open projects but thats it.

China has quite a lot of tech companies which have managed to handle scale, but not much is known about their tech stacka and engineering practices. Anybody knows about it, or where i can get more information