What problem does the warning specifically for Chinese tourists reflect?

The following are warnings specially designed for Chinese tourists at some foreign attractions. Which ones trigger your pain?

In San Francisco, USA, buses clearly indicate in Chinese: The law stipulates that the seats in front are for the elderly and disabled.

Three Chinese slogans were hung at the ground pick-up station in Venice, Italy: Chinese tourists are not allowed to litter in this scenic spot; they are not allowed to make loud noises when visiting this scenic spot; and they are not allowed to graffiti in this scenic spot.

In Germany, the former residence of Karl Marx in the ancient city of Trier is clearly marked in Chinese: No smoking and no eating snacks.

On the grass in front of the Grand Palace in Thailand, a Chinese notice saying "Please do not trample" was placed, as well as a Chinese notice saying "Please flush after defecation".

There is a Chinese sign saying "No urination or defecation allowed" outside the Louvre Museum in France.

At Notre Dame Cathedral in Paris, France, there is a sign in Chinese that reads "Please keep quiet."

At the tourist resort "Penguin Island" in Australia, there are only warning signs in Chinese, which read: Photographing or videotaping penguins is prohibited. From here on, no photography or video recording is allowed.

The quality of Chinese people needs to be improved.