About product and suppliers:
            213 si yan products are offered for sale by suppliers on Alibaba.com, of which bird's nest accounts for 1%, beauty products accounts for 1%. 

A wide variety of si yan options are available to you, 

There are 12 suppliers who sells si yan on Alibaba.com, mainly located in Asia. The top countries of suppliers are China, Singapore, and South Korea, from which the percentage of si yan supply is 58%, 16%, and 16% respectively.