I am flying UA, SFO-SIN, CX, SIN-HKG and UA, HKG - SFO. I am allowed 70 lbs max on luggage with UA but not sure about the SIN-HKG leg on CX. Will the same weight limits apply?

I looked on their web site but didn't really see an answer (or maybe didn't understand what they were saying).

Thanks for any help.

Jack