Fore water resources, the key problem of China is the efficiency of water usage.

中国水资源问题的核心是利用效率问题。

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The efficiency problem of China stock market has been the focus cared about and studied by the domestic scholars.

中国股票市场的效率问题也一直是国内学者关心和研究的焦点。

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From shortage to the largest holder, the foreign exchange reserve problem of China has attracted more and more attention from the world.

从外汇短缺到外汇储备持有量全球第一，我国的外汇储备问题引起了社会的广泛关注。

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Today,the number is still 40 percent. Part of the problem is that a number of big importers, such as China and Japan, are not doing enough to stop the import and sale of illegal timber.

VOA: standard.2010.07.28

Economist Vincent Chan from Credit Suisse in Hong Kong believes the main problem for the government is to manage expectations of the second generation of migrant workers who form the back bone of China's success.

VOA: standard.2010.06.24

Wang Hongguang, director of the National Centre for Biotechnology Development, admits that originality is still a problem for many of China's scientists.

ECONOMIST: Chinese biotechnology

Apparently well aware of the problem, China's policymakers have started to tighten credit.

ECONOMIST: China's economy

Rising housing costs in Shanghai, Beijing and Guangzhou have exacerbated the problem of rising inequality in China, as the major city centers become unaffordable to many middle class and lower-middle class Chinese.

FORBES: As Expected, China Property Bubble Re-Inflates