Can Hong Kong and Macao residents travel to and from the Mainland to buy tickets?

It's ok, the same, the same, the same

I don't know, it should be ok, I bought it online.

Mainland Hong Kong and Macau Pass can buy tickets. <br/><br/>2. The Hong Kong and Macau Pass not only supports the purchase of tickets at the ticket window of the station, but also supports online booking of train tickets. Valid ID documents that can be used online include: People’s Republic of China Resident Second Generation ID Card, Mainland Travel Permit for Hong Kong and Macau Residents, Mainland Travel Permit for Taiwan Residents, and valid passports that can be used according to regulations. <br/><br/>3. The full name of Hong Kong and Macau Exit Permit: Hong Kong and Macau Exit Permit of the People's Republic of China), commonly known as a two-way permit, is issued by the Exit-Entry Administration Bureau of the Ministry of Public Security of the People's Republic of China to mainland Chinese residents traveling to and from Hong Kong or Macau for private purposes. Travel documents for non-official activities such as visiting relatives, engaging in business, training, employment, studying abroad, etc.