What are the problems reflected in the warning signs specially designed for China tourists?

The following are some warnings specially designed for China tourists in some foreign scenic spots. What hurt you?

In San Francisco, USA, buses are clearly marked in Chinese: According to the law, the front seats are reserved for the elderly and the disabled.

Three Chinese slogans were hung at the ground station in Venice, the Italian water city: China tourists are not allowed to litter in this scenic spot; Don't make noise when visiting this scenic spot; Don't scribble in this scenic spot.

In Germany, Marx's former residence in Trier is impressively marked with Chinese: No smoking, no snacks.

On the lawn in front of the Grand Palace in Thailand, there is a Chinese sign that says "Don't trample" and a Chinese sign that says "Please flush after going".

Outside the Louvre in France, there is a Chinese sign "No defecation at will".

Notre Dame de Paris, France has a sign that says "Please keep quiet" in Chinese.

In Penguin Island, a tourist resort in Australia, there is only a warning sign in Chinese, which says: It is forbidden to take photos or videos of penguins. From now on, photos and videos are not allowed.

The quality of China people needs to be improved.