Originally Posted by
tauphi
No it's not. An S1 visa (or any long-stay visa for that matter) allows a stay of only 30 days. You must convert it into a residence permit at the local PSB (entry/exit branch) within that period.
You are mixing 2 things up.
A S1 visa allows stay over 180 days. However, similar to many EU countries, and the U.K., one must register with their local PSB, as a requirement from the hukou (household registration) system.