No, at present, all banking systems are independent. If you swipe your ICBC card, China Bank doesn't know. Similarly, other banks do not know. So, even if all your cards are spent on the same POS machine, there is no problem. As long as you don't use the same card and spend it many times at the same time. As for UnionPay, the bank has no opinion and will not deliberately monitor it. Many people swipe their cards every day. As long as they are not suspected of stealing, they will ignore you. The amount of data is too large.

Credit card application: In most cases, citizens with direct civil capacity (Chinese mainland citizen age 18) and citizens with certain direct financial resources can apply for credit cards from the issuing bank. Sometimes, legal persons can also act as applicants. The object of applying for credit card can be divided into units and individuals. The applicants are institutions, business units, foreign-invested enterprises and individual industrial and commercial households with independent legal personality in China. Each unit applying for a credit card can get a main card and several (5- 10) sub-cards as needed.

Individuals applying for credit cards must have a fixed occupation and a stable source of income, and provide guarantees to banks. The forms of guarantee include personal guarantee, unit guarantee and personal fund guarantee. The general application method is to fill in a credit card application form. The contents of the application form generally include the applicant's name, basic information, economic status or income source, guarantor and its basic information, etc. , and submit some certificates and copies of certificates to the publisher. After filling in the application form truthfully according to the contents of the application form, the customer shall submit a complete application form and relevant credit certificates. The application form is attached to the credit card use contract. The applicant authorizes the issuer or relevant departments to investigate its relevant information and submit a statement on the authenticity of the information and the privacy protection policy of the issuer, which shall be signed by the applicant.

Need to prepare: (1) information of the host card holder. (2) Supplementary card applicant information. (3) guarantor information. (4) Other information. (5) statements and signatures of the applicant for the main card and the applicant for the supplementary card. (6) Bank column.