Reading between the lines it appears Taiwan is behind the beatup (over the last week) that Chinese nuclear submarines are newly, or in the last 12 months, berthed at China's Yulin/Longpo Naval Base Complex. Yulin/Longpo, China's southernmost submarine base, is on China's Hainan Island (see Map below).
To give newly a bit of US credibility Taiwan seems to have ascribed the information to US site, GlobalSecurity. See two such reports at VOA here and "WW3 fears..." here.
This beatup appears specifically timed as a "crisis" for the incoming Biden Administration.
The problem is the widely respected, accurate strategic website, Federation of American Scientists (FAS) reports, on its Type 094 SSBN nuclear submarine page :
"In late 2007 or early 2008, the first TYPE 094 deployed to Yulin Naval Base on Hainan Island in the South China Sea."
Meanwhile the Jamestown Foundation's China Brief July 21, 2017 advised:
"Most recently, geospatial analysis conducted by AllSource Analysis has recently revealed four Jin-class (Type 094) ballistic missile submarines (SSBNs) at Longpo [Yulin complex] Naval Base on Hainan Island...". (see image below)
Photo of a Type 094 SSBN (nuclear submarine) at Yulin/Longpo Naval Base complex, Hainan Island from the 2017 report. (Photo courtesy Google Earth with one image going as far back as 2013, via Jamestown Foundation)
---