This beach is a patch of sand alongside the Huangpu designated for partying, lounging, and beach sports. During the summer, most Saturdays they have events here, all open to the public, where you can come, drink some, eat some and put your toes in the sand. They also have a splash pool that's deep enough, just about, to get wet. Entry price varies but it's usually about 50rmb, or 100rmb with a drink or two. Check event listings for what's going on here.