A group of European countries (including the Czech Republic) has introduced a new Entry/Exit System (EES) called ETIAS. US and European websites state that the online application and small fee will begin "later in the year" or "in the last quarter of 2026". A date has not been set at present. Please check https://travel.state.gov for updates regarding this system before departure. If you plan to travel to additional countries, please check the requirements.
You will need to apply for a visa at least 4 weeks before departure, but you can apply as early as 6 months prior. There is a Visa Application Center located in Guangzhou. If you plan to travel to additional countries, please check the requirements.