To apply for a credit card online, you can use the following methods:

1. Log in to the bank’s official credit card customer service center, click Apply for a credit card, fill in your personal information, and submit the application. For example: Open the official website of Bank of China, click Apply for a Credit Card Online in the Convenient Services column, select the required card type, click Apply Now, follow the prompts to enter information for personal identity verification, and submit the information.

2. Follow the WeChat official account of the bank’s credit card center and apply. For example: Follow the "Bank of China Credit Card" official account, click My Account - Card Application·Recommendation - Online Card Application | Self-service Quick Processing, select the appropriate card type, click Apply Now, and enter the relevant information.

3. Log in to mobile banking and apply. For example: Download and log in to China Merchants Bank's personal credit card software "Pocket Life", click Finance - Card Application, select the card type, fill in personal information, and apply.