In fact, the credit cards of every bank are similar. If you want a higher amount, you'd better provide proof of personal assets, proof of income and a copy of driving license if you have a car. The more information, the better. There are no restrictions on account registration. As long as you have a regular job, just provide relevant information. Basically, you can do it in any bank. A monthly salary of 5000 can probably be overdrawn 10000, but it depends on the bank's evaluation. Every bank is different. The bank will comprehensively consider your work, work unit and previous credit records, and finally give you a quota, which is generally 2-5 times your salary.
3. You can handle it without a real estate license. Relatively speaking, the amount may be lower.