16.5 km. According to Baidu map, it takes 38 minutes to drive from Renhuai Laojian to Luban 16.5km, passing through Luban Avenue (north section) and Luban Avenue (middle section). You can also take Renhuai 7 Road 1 Line from the Municipal Housing and Construction Bureau Station to Luban Bus Stop, and the whole journey takes 7 minutes 1 hour.