How to tell the quality of bird's nest? Is there a shop in Jiashan that specializes in consulting and buying bird's nest?

I began to eat the bird's nest sold by Yan Fu's family opposite Jiaxing No.1 Middle School. After Yan Fu's family in Jiaxing No.1 Middle School opened, I began to eat their fresh stew every day. I booked two bottles of set meals a week, and I don't need to deliver them to my home on the same day. Very convenient. You can ask questions about bird's nest. There is also a branch in Jiaxing, Yaohan, and a branch in Jiashan is also under preparation.