What is the rebate from travel agencies?

This is a term within the industry, which means that when a travel wholesaler wholesales its own products (route, itinerary) to peers (retailers), it will give peer prices (peer prices). If it is 1,800 yuan, then the retail price of the peer (retailer) can be 2,100 yuan, which generates a profit of 300 yuan, which is the "rebate from the peer"