Hi there,
On this one, while there is not an English post, there is a post about damage that impacts your area here.
A bit from the page translated comes out as this.
" Note: Due to the APCN2 S7 submarine cable barrier at 5:33 on March 7, 2019, after the company’s emergency dispatch support, customers connecting Singapore, China, Hong Kong and Malaysia will not be affected during the general period. During the peak period, some connections may be slightly delayed. After the repair is completed, it will return to normal. The inconvenience caused, please forgive me."
This can be the full reason for the rerout. We are keeping an eye on this issue and have no fix at this time.
/Nathardrick
Edit: We’re redirecting all of these posts to this centralized thread with all of the information so we can provide updates. Feel free to post here.