00:00
00:00
00:00
00:00
00:00
00:00
00:00
00:00
00:00
00:00
00:00
00:00
00:00
00:00
00:00
00:00
How to find the dot; Direction of power; Level of power and distance; Switching of power
Presenter: Chen Zhonghua Length: 41 min. In: English & Chinese Year: 2012 Difficulty:2/5 At:Singapore