How to handle the Tianjin Pass on that day?

You can apply to the relevant departments. Ask the local authorities specifically. Pass a license for a specific area. The Travel Permit to and from Hong Kong and Macao, commonly known as the Two-way Permit, is a travel document issued by the Exit-Entry Administration of People's Republic of China (PRC) and People's Republic of China (PRC) (namely, the State Exit-Entry Administration, with two brands in one organization) to China mainland residents for private travel to and from Hong Kong or Macao, visiting relatives, engaging in business, training, employment, studying abroad and other non-official activities. Mainland residents travel to and from Hong Kong and Macao Special Administrative Regions for personal reasons, visit relatives, engage in business, training, employment and other non-official activities, and apply to the municipal and county public security exit-entry administration departments where their household registration is located. Go to Hong Kong and Macao with a pass and valid endorsement issued by the exit-entry administration department of public security.