2 1/2 turns should be fine on the high speed needle. Leave the low speed needle where it is unless the engine won't start without priming, and won't stay running below half throttle after priming. In that case richen the low speed needle half a turn and try again.

Actually, the Chinese use the same numbers we do, so a careful examination of the diagrams and the numbers that go with them should let you figure out what they are calling for.

Jim