You need to take Metro Line 18, Line 8, and Line 2.

According to the Baidu map information, you need to take Line 18, Line 8, and Line 2 from Guangzhou Longtan to Guangzhou Wanguo Outlet Metro.

The whole journey takes 40 minutes.

The specific route is as follows: 1. First, take Metro Line 18 from Guangzhou Longtan Station.

2. Next, go through 1 stop, get off at Modiesha Station, take Line 8, and go through 6 stops.

Get off at Changgang Station.

3. Finally, take Metro Line 2 from Changgang Station, go through 1 stop, and get off at Jiangnanxi Station.

Walk 636 meters to reach the end point, Guangzhou Wanguo Outlet.