These foods will affect other passengers. If you want to eat durian, you'd better go to the high-speed rail restaurant so as not to affect people around you. Thick soup food is also not suitable, it is easy to dirty the seat or the ground, and it gives off a strong smell. Coffee and milk tea are also fragrant, so it is best to choose cold drinks. If someone eats these foods and affects your ride experience, you can communicate politely and ask the other person to avoid them. If not, you can consider changing seats or complaining to the staff, and they will take appropriate measures to solve the problem. As a passive measure, you can also bring your own mask and wet wipes to protect yourself. Pay more attention on the high-speed rail and prepare for emergencies.