People living together must enter the country at the same time. If no one lives with you, you don't need to fill in this item. For example, a couple and two children; Father (grandfather) or mother (grandmother, grandmother) and three children (grandson, grandson).
People who enter Shenzhen from Hong Kong via Shenzhen Bay Port need to make reservations at the health station. If you can't produce a valid confirmation form on the day of customs clearance, you will not arrange a health station room and arrange to return to Hong Kong.