What should mainland residents do if they want to travel abroad because they work in Hong Kong?

As long as you have a Hong Kong work visa and have worked for more than three months, you can apply for a Hong Kong identity card at the Hong Kong Immigration Department immediately after entering the country (which is somewhat different from the Hong Kong permanent identity card). Under normal circumstances, the entry-exit units in China will issue Hong Kong and Macao passes to China citizens to travel to Hong Kong or Macau. This certificate is only used in Hong Kong and Macao. To go abroad, you must hold a China passport. Foreign consular offices in Hong Kong will only issue visas to Hong Kong residents (including temporary residents). Generally speaking, China ordinary passport holders who have no contact with Hong Kong and foreign consulates in Hong Kong will not apply for visas. It is indeed much easier to apply for a foreign visa in Hong Kong than in China, but the outcome of each case may be different according to different circumstances.