China Seeks to Protect South China Sea Submarine Gateway

China’s efforts to protect its submarine gateway to the South China Sea could broaden from standoffs with U.S. military planes to announcing an air defense identification zone, according to two retired army officers. China could seek to restrict the air space around Hainan Island as the U.S. routinely runs surveillance flights in the area, retired Colonel Yue Gang said. The move would mirror a zone China set up in November over portions of the East China Sea disputed with Japan.

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