The small army influences the weather for more reasons than just to alleviate drought. Everything from firefighting to having the perfect conditions for the Olympics are now being influenced by Chinese efforts.
An interesting question for the future is concerns the "right" of countries to make it rain. The moisture that is being prematurely forced into rain could have become rain for South Korea, Japan, Taiwan, etc. A whole slew of problems from water access to denying rain for political purposes to others are just some potential things which may lie in the future.