China International Airlines, China Eastern Airlines, China Southern Airlines, Hainan Airlines.
Cathay Pacific, Singapore Airlines, Thai Airways, Japan Airlines.
In terms of price, domestic airlines may be relatively cheaper.
Baggage, foreign airlines (including Cathay Pacific), are all 20KG, and there is no limit on the number of pieces, only 20KG. I haven't heard that Cathay Pacific has luggage for overseas students. I have been on Cathay Pacific for so many years, and it has always been 20KG.
Domestic airlines can check 30 kilograms of luggage. There is no limit to the number of pieces.
Carry-on luggage is the same, 7KG. Not including the weight of the computer. Two pieces will do. The inspection of 7KG is not strict, and there is no problem within 10KG.