hinese marriage became a custom between 402 and 221 BC. Despite China's long history and many different geographical areas, there are essentially six rituals, generally known as the three letters and six etiquettes (三書六禮). Unfortunately for some traditional families, the wife's mother cannot go to her son-in-law's family until one year (according to the Chinese lunar calendar or Chinese Lunar New Year) after the wedding has elapsed. However, during this one year the daughter can go back at anytime.