Other Asian, Australian and South Pacific Frequent Flyer Programs - Air China Booking Class

Hi,

I need to book a flight from Frankfurt to Taipei on *A and as CA is usually the cheapest option I wanted to book them. But I'm short of 8000 miles to hit *Gold I was thinking to book a class like K,M to gain 100% miles. But these prices are almost double of the cheaper classes so I was thinking whether its possible to book one leg in a higher class and one in the lower class. Does anyone know how to do that online (Expedia or CA website)?

Or does anyone has any other suggestions?

Does it price the same with two one ways ? One in a higher fare class as one in the lower one?

Call CA or a travel agent. You cannot chose booking classes when booking int'l flights online.