Not high. The diamond card limit is 50,000 yuan and above. The main conditions for applying for a diamond card are similar in each bank. The specific limit is determined based on the application materials and personal comprehensive information provided, so it is not high. Bank of China's Great Wall Credit Card is a powerful combination of Bank of China and China Mobile. They jointly launched the Bank of China Great Wall China Mobile Credit Card and cooperated with MasterCard International and China UnionPay respectively.