What Japan had paid to China: A worthless deal?

One of the top discussions among international forums recently is about the safety of food manufactured by Mainland China. China is under seriously criticized by its dangerous milk stuffs as there is a growing number of innocent victims, both in Mainland China, Taiwan, Japan and Hong Kong respectively. Remember last year in March, the United States had found that Chinese made animal food was poisonous, which killed various number of cats and dogs. The disaster of food safety in China finally becomes a world focus.

China is sill recovering hardly from Sichuan earthquakes. Most people in the Mainland are struggling from surging food prices, bad air environment and overcoming worsening social conditions (crimes, pollution, bomb attacks, etc.). However, the central government is still investing millions of US dollars on launching rockets to uncertain far-away Moon. Even rich countries such as Swiss, Finland, and Sweden seldom waste any money on this large-scale project especially when local citizens are still bearing heavy burden on their lives. A protective clothes used in space costs more than rebuilding ten secondary schools in devastated Sichuan. Space projects are seem to be more important than saving people's lives.

Japan, one of her closest neighbours, gives a large amount of subsidies and loans each year to China. But in return Japanese are the victims of dangerous Chinese food. Japan is often criticized by China for not apologising for her past invading history despite the fact that Japanese officials have deeply apologized for many many times in the past thirty years.

Remember one interesting source from the Internet:

Total amount of aid the Japanese government will give to Burma for it’s recent cyclone disaster:
28 million yen

Total amount Japan pays to China for renting two pandas each year:
100 million yen

(source: http://learnjapanesepod.com/newblog/)

If there were no obvious argument to justify Japanese government to pay for such a large sum of money to China every year, why should Japanese need to keep those pandas in Japan and why shouldn't they simply return those pandas to China as soon as possible?

Further reading:
http://news.bbc.co.uk/2/hi/asia-pacific/4835752.stm