CA also flies 747s PEK-CAN

Compared to USA, domestic first is very affordable. Sometimes buy-up offers around check-in are a great deal too (though with CZ you don’t get first class inflight meals if you take the offer)

Widebody domestic first (business) is the best value out there, especially on planes with best hard products. Generally newer planes like A350s and 787s will have 1-2-1 seating, but be sure to check detailed seat maps before buying and be aware equipment swaps are common