There are disposable bus cards, handwritten bus cards, disposable time bus cards, monthly bus cards, group bus cards and tourist bus cards. 1998 Qingdao introduced disposable bus cards, handwritten bus cards, disposable fixed bus cards, monthly bus cards, group bus cards and tourist bus cards to meet the needs of different types of passengers. One-time bus cards can be used for single passengers, handwritten bus cards can be used for registration, one-time bus cards and monthly bus cards can be used for regular passengers, and group bus cards can be used for unified management of employee monthly tickets and tourist bus cards. 1988 Qingdao has a total population of 6.996 million.