You'll want to know what fare class you're buying to CAN. If you're going in Economy, many CZ economy fare classes earn a dismal amount of miles (actually zero on most partners but will earn a few miles in their own program).

Miles are earned per segment based on your fare class, so you'd get the miles for LAX-CAN sometime after that trip, maybe before you leave CAN, maybe not. I'm not familiar with SkyPearl Club's booking policy but some airlines charge a fee of up to $100 each for short notice bookings (within 14-21 days).

Having said that, if you buy from Ctrip or eLong, the round trip ticket from CAN to LJG is less than $200 a person, not really a good use of miles in my own opinion. In addition, I checked their website and CAN-LJG is 10,000km each way for award tickets... for LAX-CAN if you buy one of the most expensive tickets you'd earn 11,632km but most economy fares will only earn 4,652km for the segment. Basically you're going to need more flights to add up to a worthwhile award ticket.

If your fare class earns a respectable amount of miles, I'd put the miles in DL or AM accounts, most of the Asian based programs are not nearly as favorable when it comes to amount of miles needed for redemption and they also expire if you don't use the miles within 3 years where the North American programs do not as long as you have minimal account activity. For earning on Delta, this means booking in one of the more expensive economy fares (Y, H, K, T, or M... G fares don't earn LAX-CAN and W and Z are premium economy fares)

https://www.delta.com/content/www/en...-southern.html