分析下面这个句子的成分They are Dai（傣族）and grew up in western Yunnan Province near the Lancang River ,the Chinese part of the river that is called theMekong River in other countries.the Chinese part of the river 充当什么成分,是同位语,插入语,还是都不是that 引导的是什么从句,是不是定语从句

分析下面这个句子的成分
They are Dai（傣族）and grew up in western
Yunnan Province near the Lancang River ,the
Chinese part of the river that is called the
Mekong River in other countries.
the Chinese part of the river 充当什么成分,
是同位语,插入语,还是都不是
that 引导的是什么从句,是不是定语从句