It usually consists of strips of raw fish (sometimes salmon), mixed with shredded vegetables and a variety of sauces and condiments, among other ingredients. Yee sang, or yusheng in Singapore, is considered a symbol of abundance, prosperity and vigor.
While versions of it are thought to have existed in China, the dish in its modern form was created and popularised in the 1960s amongst the ethnic Chinese community and its consumption has been associated with Chinese New Year festivities in Malaysia and Singapore.
Today, the common form of yusheng is the qicai yusheng (“seven-coloured raw fish salad”) served in local restaurants during the Chinese New Year period. Also referred to as facai yusheng (“prosperity raw fish salad”) or xinnian yusheng (“Chinese New Year raw fish salad”),
According to singaporetravelhub.com