Hi, I had a double-entry L visa for tourism on November 2017.

I was told shortly after that I would be working in Shanghai for 2 months, so I applied for an M type and I got a double-entry 30-day M type. After my work period I'd like to travel around the country. Can I go to HK and re-entry with the spare L type entry I still have? Or as I have also applied for a M type afterwards is the first L type automatically canceled (although I still had 1 entry)?

Thanks in advance for your help.
KR,
Laura