Sanya Pipi Shrimp is a delicious seafood that can be found in many restaurants and seafood markets in Sanya. Here are some places to try:

1. The First Market: Sanya First Market is a famous seafood market located in the downtown area of Sanya. Here you can buy fresh pippin shrimp and have the option to have the vendor cook it for you or take it away and cook it yourself.

2. Yalong Bay Commercial Plaza: Yalong Bay Commercial Plaza is a commercial complex integrating shopping, dining and entertainment, located in Yalong Bay Resort, Sanya. Here you can find many restaurants and food stalls, some of which serve pippin dishes.

3. Sanya Bay Coconut Dream Promenade: Sanya Bay Coconut Dream Promenade is a famous seaside promenade located in Sanya downtown. Here you can find many food stalls and restaurants, some of which serve pippin dishes.

4. Wuzhizhou Island: Wuzhizhou Island is a beautiful island located in the southeast of Sanya downtown. Here you can enjoy delicious seafood, including Pipi shrimp.

Whichever place you choose, make sure the seafood you buy and eat is fresh and pay attention to the hygiene and service quality of the merchants.