Compared to China, both as developing country with large territory, what historical reason have lead to two different results?

与我国相比，同为第三世界，国土较大，经济不平衡，是什么历史原因形成了两种不同的结果？

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As a developing country, the consensus reached by the large number of countries: in the case of multilateral consultations should create a universal adherence to international conventions.

作为发展中国家，众多国家达成的共识：应该在多边协商情况下创建一个所有国家都普遍遵守的国际公约。

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As a developing country, South Africa has also made great efforts in environmental protection.

作为发展中国家，南非在环保方面也做出了巨大努力。

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As the world's largest developing country, China has made its position on climate change clear.

VOA: standard.2009.12.16

Wang says that as the biggest developing country and biggest developed country, the mutual economic relationship of the United States and China is having an impact on the entire world.

VOA: standard.2010.05.25

We also have a target to reduce 26 percent of our emissions by 2020, with the cooperation of the international community, the United States and Indonesia, as developing country and developed country.

WHITEHOUSE: President Obama and President Yudhoyono Press Availability | The White House

Firstly, as a developing country, Mexico isn't cutting emissions but cutting the rate at which they'll rise.

BBC: Inside Mexico's climate revolution

Even with passports, Cubans need visas to visit most places and as a developing country, entry requirements are strict.

BBC: Cubans set for foreign travel as exit permits abolished