既然中国自古一直都在南海巡防保安,那里的石油资源也不是第一天被发现,那眼下争端的导火线是什么?
jìrán Zhōngguó zì gǔ yīzhí dōu zài nánhǎi xún fáng bǎoān ,nàlǐ de shíyóuzīyuán yě bù shì dì yī tiān bèi fāxiàn ,nà yǎnxià zhēngduān de dǎohuǒxiàn shì shénme ?
Given that China didn't just find out about the oil and gas reserves recently, as they have engaged in security patrols of the South China Sea since ancient times, what was the trigger for the current dispute?