His visit is part of a behind-the-scenes battle that is raging worldwide over reforms in China's labor law. On the one side are Wal-Mart, Google, General Electric (GE) and other global corporations that have been aggressively lobbying to limit new rights for Chinese workers. On the other side are pro-worker-rights forces in China, backed by labor, human rights, and political forces in the US and around the world.
It is also OK to write this construction more briefly:
On the one side we have the global corporations, and on the other, the pro-worker-rights forces in China.
(Note how 'side' can be omitted (if you want) in 'on the other' in the briefer version.)