You don't need proof of salary to apply for a credit card online. Taking the online application of China Merchants Bank as an example, the steps and processes of online credit card application are as follows:

Step 1: Open Baidu search, enter "China Merchants Bank" in the search bar, find China Merchants Bank official website after the search and click Enter.

Step 2: After entering China Merchants Bank official website, find the item "Credit Card" and click Enter.

Step 3: After entering the credit card, find the item "Get the card now" and click Enter.

Step 4: Immediately enter the card processing process, find the card type of the credit card you want to apply for, and then click Apply Now to enter.

Step 5: After entering the instant application, enter the corresponding information according to the system prompt, and then click OK.

Step 6: Select the card type to apply for after entering, then enter the mobile phone number, get the verification code and enter it, and click Next after verification.

Step 7: Check the service agreement after entering, and then click Submit Now to complete the whole process of online credit card application of China Merchants Bank.

At this point, you can apply for online credit card by the above operation.