Hello, there are many airlines that can get you from North America to China; however, Hainan is not one of them. Hainan Airlines ceased all of their flights to North America during the pandemic and have not shown signs of those flights coming back (I miss the LAX-CTU flight). The best ways to get to China on an Alaska partner are Cathay Pacific and Japan Airlines. I do not think it is possible to book flights to China on the Alaska website, so you will need to call Alaska reservations.