Original sentence: Hainan, the largest island of China, is separated by the Qiongzhou Strait(瓊州海峽) from the Leizhou Peninsula (雷州半島) of Guangdong
Edited sentence: Hainan, second largest island of China (after Taiwan), is separated by the Qiongzhou Strait(瓊州海峽) from the Leizhou Peninsula (雷州半島) of Guangdong