There are 25% people without credit cards in Shenzhen. By inquiring about the number of people who don't have credit cards in Shenzhen, it is known that the number of credit cards issued in the city has exceeded 5 million, and credit card users cover most age groups and social classes of citizens. The competition in Shenzhen's credit card market is relatively fierce, but there are still 25% people who don't have credit cards. These people will be the elderly and younger children. Shenzhen, also known as Pengcheng for short, is a prefecture-level city under the jurisdiction of Guangdong Province, a city with separate state plans, a megacity, a special economic zone, a national economic center city and a national innovative city approved by the State Council, and one of the core engine cities in Guangdong-Hong Kong-Macao Greater Bay Area.