祝你购物愉快
Zhù nǐ gòuwù yúkuài
If we breakdown the phrase:
祝 to wish or to congratulate
你 means you
购物 means shopping
愉快 means to have a fun time, enjoyable
An example: If you went to a shopping mall, the people from the mall may say welcome to the mall. “Hope you enjoy shopping here.” is what they exactly wanna express. 欢迎您来商场购物，祝您购物愉快!