Hainan Submarine Base is a naval base for nuclear submarine in Hainan Island, PRC[1] [2]Thisj underground base has recently reported by several agencies, especially Indian ones. Hainan ( POJ: Hai-lam Pinyin:, Jyutping: hoi2 naam4 literal meaning "South of the Sea" is the smallest province of the People's Talk People's Republic of China) PEOPLE'S REPUBLIC OF CHINA ARTICLE GUIDELINES The images collected by Federation of American Scientists (FAS) in February 2008 shows that China constructed a large scale underground base for its naval forces. This base raises concern over security threat to ASEAN nations, India since it has the capability to cut off all commercial activity in Strait of Malacca and South China Sea in case a crisis occurs. The Association of Southeast Asian Nations, commonly referred to as ASEAN, ˈɑːsiːɑːn AH-see-ahn in English (the Official language India, officially the Republic of India (भारत गणराज्य inc-Latn Bhārat Gaṇarājya; see also other Indian languages) is a country The Strait of Malacca is a narrow 805 km (500 mile stretch of water between Peninsular Malaysia (West Malaysia) and the Indonesian island of Sumatra The South China Sea is a Marginal sea south of China. It is a part of the Pacific Ocean, encompassing an area from Singapore to the [3]