Carrie Lam To File Complaint About U.S. Sanctions

The US imposed sanctions on Chinese and Hong Kong officials following China's new national security law, which the US claims undermines Hong Kong's autonomy. In response, China filed a complaint with the World Trade Organization. Carrie Lam, Hong Kong's leader, stated she would continue to act in the best interest of China and Hong Kong despite the sanctions, which have affected her ability to conduct personal business, such as using credit cards due to frozen US assets.

What impact do the sanctions have on Lam's ability to conduct personal business?

What specific issue does Lam face regarding her credit cards due to the sanctions?