NCC BSMI query method
Both BSMI and NCC certificates can be found on the BSMI and NCC websites.
However, the mainland seems to have a government website that locks Taiwan, and it may not be able to connect, as follows, thank you!

http://civil.bsmi.gov.tw/bsmi_pqn/index.jsp

https://nccmember.ncc.gov.tw/Application/Fun/Fun016.aspx