Between 3000 yuan and 50000 yuan. According to the information inquired by the credit card network, the credit card amount of China Bank ranges from 3,000 yuan to 50,000 yuan, while the credit cards of China Bank are divided into ordinary cards, gold cards and platinum cards, and the credit card amount of different levels will be different. The minimum credit card limit is 3,000 yuan and the maximum credit card limit is 50,000 yuan.