some countries have huge stockpiles of horn hidden in warehouses. All it does is push the price of fresh horn up and serves as a huge incentive for poachers.
They should sell the horn on the market to drop its price and provide a disincentive for poachers and encourage rhino horn farming so people actively want these animals to live. Maybe some poachers may turn to farming?
The Chinese government has huge influence in the so called developing world as they are financing a lot of their infrastructure projects and providing people with jobs. sitting in the west and moaning isn't going to solve their problems.