China is the most populous country on the planet. Formerly communistic, it turned very capitalistic. This large country and great culture offers many superb touristy sites with the Great Wall (the only structure visible from the moon) being the most famous. Beijing and Shanghai in particular are worth a visit. China has excellent, very fast trains and travel has become really easy. Hong Kong and Taiwan are listed separately.
China is still holding on to a zero COVID-19 policy. This means that COVID-19 is to be eradicated completely everywhere, what can result in sudden lock-downs. Travelers may have to undergo 21 days of quarantine at arrival.