Originally Posted by Chinatrvl

"Lots" means two fare buckets on FM/MU (W, X) and two on CZ (R, N), which are arguably very cheap, highly restricted fares - and fares somebody on business trips wouldn't use anyway.

FlyingBlue works out great for me, China based, c. 100 flights per year. MU/CZ would give lounge access for plats on domestic flights, however miles expire in their programs. Noteworthy, within the CZ/MU/FM programs, a first class flight counts as two qualifying segments and many lower fares don't count at all. That's an important detail in the original overview.