Why Internal Flights in China at Such Low Prices?

When you check out the flight schedules for internal flights in China, you will find some of them are listed as 10%, 20%, 30%, 50% or even 40% off the main air ticket price.
Maybe you can’t understand why are they listed at such lower prices. Is there any reason for them to be avoided?Or is it simply 1st come 1st serve?
I will tell you that this is just the Chinese air ticket marketing. Please regard it as common. Also, these discount flights will take off on time. You don’t need to pay the full ticket price.
Besides the ticket price listed, you should pay the airport construction fee CNY 50.00 and fuel charge CNY 150.00(exceeding 800 kilometers, CNY 80.00 within 800 kilometers)with the ticket in China . Travelers no longer have to buy it at the airports.
Beijing - Qingdao air ticket
Beijing - Shanghai air ticket
Beijing - Sanya air ticket
Beijing- Guangzhou air ticket
If your luggage is over the limitation, you will need to pay for the excess weight, and some of the airports in China are quite strict with this. Tip for this: If you are traveling together in group more than 1 people, you can use your allowance together, for example, if you have 35kg, your friend have only 5kg, it will be fine as long as you two check in together. This method also applies to 3, 4, 5 or even more people within one group, as long as you are checking in at the same time over the airport counter.2) For the carry-on luggage, total weight of carry-on baggage for each passenger may not exceed 5kg (11 pounds). First class passengers may carry up to 2 pieces. All other passengers may carry on only one piece. The size may not exceed 20×40x55cm. Carry- on baggage in excess of the limit is subject to an excess baggage fee and must be carried as checked baggage.1) Articles which cannot be taken as baggage: flammable, explosive, corrosive, poisonous, radioactive, polymerizable and magnetized materials, and arms, sharp or lethal weapons as well.2) Articles which cannot be packed in the checked baggage : important documents, classified materials, diplomatic mail bags, negotiable securities, currencies, money orders, valuables, vulnerable perishables and articles and other articles needed in the special custody of somebody. The carrier will not be liable for the loss of or damage to the aforementioned.3) Articles which should be put in check-in baggage: knife, scissors and bottled or tinned alcohol/ wine. 4) The checked baggage should be packed perfectly with a lock, tied up solidly and be able to withstand pressure to a reasonable extent. Carriers may refuse to accept for carriage if the baggage packing does not meet the requirements.5) The carrier will be liable to compensate for the loss of or damage to the checked baggage due to the carrier’s fault. The norm of compensation shall not exceed RMB 50 yuan per kg. If the value of the baggage is less than RMB 50 yuan per kg, the amount of compensation shall be paid according to its actual value of the loss.6) A passenger may declare the value of his baggage if the value of his checked baggage exceeds RMB 50 yuan per kg. Baggage declared value can not exceed the value of the current baggage. The maximum baggage declared value is RMB 8,000 yuan.7) Passengers and their baggage (including checked and carry-on baggage) are subject to the security inspection before boarding the aircraft.
you will find more about Chinese flights information here http://english.51766.com/channel/flight.jsp