Japan

It is "perfectly" okay to make a noise when you eat noodles. But in China, avoiding the noise is necessary. Chopsticks touching the rice bowl is not only impolite, but also means having no food. It's important to say thanks before and after a meal.

Russia

Your wrists should be placed on the edge (边缘) of the table while eating, fork in the left hand and knife in the right hand. Keep your hands in sight. It is not good manners to rest them on your legs. Keep your elbows off the table. Leave some food on your plate to show that the host has given you enough to eat, or the host will ask if you'd like to have a second helping.

France

In France, a meal is like a ceremony. People enjoy it and make it a special event. Unlike Russia, it's regarded as good manners to finish everything on your plate. People often cut bread directly on a table cloth rather than on a plate. Tear your bread into small pieces before eating. Taking a bite from the whole piece is very impolite.