Which port should I go to with my passport to Hong Kong?

Any port will do. But unless you leave the country through Hong Kong and Macao, it is not recommended that you use your passport to go to Hong Kong and Macao. Go to Hong Kong and Macao with a Hong Kong and Macao Pass, not directly with a passport. If you use your passport to go to Hong Kong and Macao instead of going abroad, it will be recorded in the customs file. If you go to Hong Kong and Macao in this way many times, the customs officers have reason to punish you or even put you in prison for cheating, and your entry and exit situation will also be blacklisted, which will directly affect your future travel.