Middle-income trap is an obstacle that developing countries have to overcome on their way to becoming developed countries. It is an inevitable issue facing China which is developing very fast. ANBOUND chief researcher Chan Kung once said that China wasn't going to be caught in the middle-income trap, it was actually in the trap. System factor is probable what can actually stop china from stepping over middle-income trap successfully. If China can deepen its system reform, it will be able to further exploit its potential, which will help it to get sustained growth and eventually step over middle-income trap.