Let R_1 be the change rate from RMB to US dollars when transferring money from China to U.S., and R_2 the rate from US dollars to RMB when transferring money from U.S. to China.
Are R_1 and R_2 exactly reciprocal to each other? i.e. is R_1 = 1/R_2? If not, why?
Does the relation between R_1 and R_2 depend on the specific banks in China and in U.S.? For example, R_1 is from bank C1 in China to bank A1 in U.S, and R_2 is from bank A2 in U.S. to bank C2 in China.
Are the transfers for both directions done in banks in china, or in banks in U.S.?