The first of its kind to open in Sunset Park’s Chinatown, Ten Ren continues to be the go-to store for both tea leaves and bubble drinks. The iced sippers, shaken by baristas at the green marble counter, include the classic zhen zhu nai cha, a creamy black milk tea packed with chewy tapioca balls. Shelves lined with golden tins fill the rest of the space, where a vest-clad shopkeep spoons out leaves by the ounce.