How much is the free baggage for international students' air tickets?

As far as domestic airlines are concerned, there are no overseas student tickets. In other words, as long as there is a special price, both international students and ordinary individual travelers can make reservations. It's just that international students check more luggage with visas. (usually 40 kg)

2. For foreign airlines, there is a difference between international student air tickets and individual air tickets. Once the air tickets for international students are booked, they are cheaper, and the luggage is checked at least 30 kilograms. But once the individual ticket is booked, the price is more expensive and the luggage is less. (usually 20 kg)