Pictures. We always need pictures.
How good is 7-8 month old Shanghai gasoline? Did you add a treatment before storage and how much is in the tank?
If it's a full tank and untreated, you may want to pay a thief a few ¥ to steal what's left in the tank.
Otherwise top it up with fresh gas and run through a tank ASAP.
Welcome back - we were worried about you.