这两个句子都是正确的吗?Hainan,with an area of 33825 square kilometers,i

这两个句子都是正确的吗?
Hainan,with an area of 33825 square kilometers,is located in the south of China and separated by Qiongzhou Straits,which is the second largest island of China with more than six thousands years' history.

Hainan,with an area of 33825 square kilometers,which is the second largest island of China with more than six thousands years' history,is located in the south of China and separated by Qiongzhou Straits.
这两个句子表达的意思一样吗?
这两个句子语法上有什么问题?
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