Hey Shuai, Thanks for writing your concern. Appreciate your feedback on token burning mechanism. We have an updated token economy here which includes the burning mechanism. This is implemented in a way that Aurora smart contracts on Near blockchain (Aurora Engine, Aurora Cloud instances, Rainbow Bridge contracts, etc.) actually collect NEAR tokens over time and we use these NEAR tokens to buy back AURORA from the market and burn it.
You can read the full approved proposal here : AURORA Token economy 2.0