Traditional etiquette: the most characteristic of Chinese culture; the fist-and-palm salute
The fist-and-palm salute, also known as "zuoyi" in Chinese, is not only used as a sign of respect and aplomb but also as a greeting in that country. The fist-and-palm salute has a more than three thousand-year history and dates back to the Western Dynasty (11th century – 771 BC) as a greeting and association. Ancient Chinese people would salute one another as a matter of formality and modesty.
As opposed to the physical intimacy that Westerners use to express respect for others, Chinese people prefer to maintain a respectful distance. This kind of distance is appropriate for modern hygiene as well as being a demonstration of beauty. The fist-and-palm salutation is regarded by many specialists who research this custom as the welcome that best captures the spirit of China.
If you are a foreigner, you will be moved by the sincerity of this welcome and may choose to return it to the sender out of respect.