If I am in Changsha and my household registration is in Chenzhou, and I want to travel to Hong Kong, do I have to go back to the place of household registration to apply for a visa?

Yes, for the first time, you must go back to the exit-entry administration office in your place of residence to apply for it. Hong Kong and Macau passes cannot be applied for on behalf of others.

As for traveling to Hong Kong and Macao for the second time, some places have opened online endorsements. You only need to apply for endorsements online, and then send and receive the pass via courier, and everything is done!