Nepal tourist

To apply for a Hk tourist visa in Nepal, your husband can submit the application to the China embassy or post it to HK immigration department directly.
Address: Receipt and Despatch Sub-unit
HK Immigration Department
2/F, Immigration Tower
7 Gloucester Road
Wan Chai, HK
He needs to provide copy of passport, the application form affixed with a passport-style photo, proof of your financial support, transportation and accommodation arrangement, and your travel plan.