What are the travel agencies that provide business travel and incentive travel services?

There is a lot that can be done. Most formal travel agencies will have some such business groups, such as China International Travel Service, Youth Travel Service, Kanghui, etc. The Jinxi branch of CITS (Sichuan) International Travel Agency where I used to work - Leyou Valley Tourism Network, one of the main businesses is business travel, corporate unit (club) incentive travel, individually customized.