qíshǒu ràng nǐ xià lóu shí, xiān wèn nǎge mén, nǎ yī céng, shénme biāozhìwù

骑手让你下楼时，先问哪个门、哪一层、什么标志物。

When the rider asks you to come down, first ask which gate, which floor, and what landmark to look for.