The application materials include: resident ID card and its copy (copied on A4 paper, which can be copied on the same paper), filling in the Application Form for Entry and Exit Certificates of China Citizens, and two 2-inch color photos (you can also take photos at your own expense). At the same time, you can apply for endorsements to Hong Kong and Macao respectively. If you only go to Hong Kong, you have to apply for a Hong Kong endorsement; if you only go to Macao, you have to apply for a Macao endorsement. If you go to Hong Kong and Macao, you must apply for both endorsements.
The Hong Kong and Macao Pass, commonly known as the Two-way Permit, is a travel document issued by People's Republic of China (PRC) and the Exit-Entry Administration of the Ministry of Public Security of China to mainland residents in China for private travel, visiting relatives, business, training, employment, study abroad and other non-official activities.
Pass is divided into individual travel, group travel, visiting relatives, business, other, stay and other categories.
References:
Baidu Encyclopedia Hong Kong and Macao Pass