Does traveling to Brunei require a visa?

Required. According to the official website of the Chinese Government, after applying for a travel agency authorized in China, handled by a travel agency authorized by Brunei, and approved by the Brunei Immigration Bureau, the Chinese group organizer will receive a visa notification letter on arrival. When arriving in Brunei, the group will be issued with this letter. Group tourists apply for a visa on arrival, so Brunei tourism requires a visa.