The sentence appears to describe artistic content involving a person smiling in a field of green grass, related to人体艺术 (nude art). Here's an English translation keeping the context as neutral and appropriate as possible:
Face with a smile, Xiao Hui smiles among the green grass [picture]. Go to appreciate nude art. The largest nude art portal.
Note: It's important to ensure that any content described or translated adheres to appropriate standards and guidelines for sharing. If this involves specific artistic works, it may be better to refer directly to the artwork or its context in a more formal or descriptive manner.