I bought Changsha to Kuqa County The plane ticket, because the previous flight was delayed and I couldn’t catch the next flight, and the latter flight didn’t want to give me a full refund. W

Can only be negotiated with customer service. Generally speaking, if the two flights are of different airline companies, the latter flight will not "pay" for the consequences of the delay of the previous flight. Therefore, when designing the itinerary, we should take into account possible accidents in the middle of the itinerary and "leave room for it", otherwise we can only bear the economic losses by ourselves.