1. Nearby Search - Provide nearby point-of-interests (POI) near current location - Provided POI categories include snacks, coffee snacks, restaurants, MRT station, YouBike, speed camera location, train station, attractions, hospitals, supermarkets, beauty salons, hotels, clothing stores, bars, shoe stores, Shopping malls, schools, flower shops, electrical shops, banks, travel agencies, bookstores, post offices, bicycle lines, steam locomotive, furniture, housing agents, pet shops, aquariums, up