@@ The blocks opening to foreign investors for jointly exploring and developing oil and gas involve Jiangsu, Anhui, Zhejiang, Fujian, Hunan,Jiangxi, Yunnan, Guizhuo, Guangxi, Guangdong and Hainan provinces, where the non-marine sedimentary basins each with an area over 200 km2amount to 167 and the total coverage is more than 400 thousand km2. They were formed respectively in early Indosinian, early Yenshanian, late Yenshanian and Himalayan.
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