I saw your comment, I accept various contact methods
Including but not limited to:
Email: keaitianxinmail@qq.com
Telegram Group: t.me/osmchina (Yes you can use English of course)
(or other method you'd like, such as PM)

But, in order to allow more other editors to participate, I prefer to use open communication channels, so I think it is more feasible to directly comment under the changeset or discuss in the most offen used telegram group in China's community.

It may take one to two days to gather mappers who have research on minority language tagging in local community, especially those living in Guangxi. I know a few of them, so I've left messages on their usual IM software.

Before that, I think your research in Xinjiang, Tibet, and Inner Mongolia can still continue