Visa for China firm to visit Brunei

We are dealing with Ironmongery business in Brunei trading under the name of GTO INTERNATIONAL MARKETING. We wish to invited BRONCES MESTRE, S.A., Shanghai Rep. Office's Manager, Mr Cheng Yong to visit Brunei for business meeting. Please advice us how to assist Mr Cheng to get a Visa?

Thank you,
Thomas Wong
GTO INTERNATIONAL MARKETING, BSB.