The primary concern for maintaining good health during travel is to always pay attention to food hygiene and prevent "illness from the mouth." Food hygiene during travel mainly involves the following aspects:
1. Pay attention to drinking water hygiene. Generally, untreated water should not be consumed. The best choices for drinking water while traveling are bottled water and disinfected, purified tap water. Next best options are mountain spring water and deep well water. River, lake, and pond water must never be consumed raw.
2. Fruits and vegetables must be washed thoroughly or peeled before eating.
3. Be prudent with every meal; avoid eating indiscriminately when hungry. Mid-to-high-end restaurants are generally safe to eat at. For street stalls or food vendors, you can be selective. Avoid eating at stalls or from street carts (pushcarts).
4. Learn to identify whether a restaurant is hygienic. The general standards for a qualified establishment should be: it has a health permit, a clean water source, disinfection equipment, fresh food ingredients, no mosquitoes or flies, dust-proof equipment, a clean surrounding environment, and cashiers do not handle food and maintain a considerable distance between money/tickets and food.
5. Be moderate with your diet on trains, buses, or airplanes. During travel, due to the lack of opportunities for exercise, the digestive process for food is prolonged and slows down. If you do not control your food intake, it will inevitably increase the burden on your gastrointestinal system and cause discomfort.