关于非谓语的简单问题(这个句子语法有没有错呢)

关于非谓语的简单问题(这个句子语法有没有错呢)
这个句子语法有没有错呢?
it is said in the passage that china has a population of 1300000000,making it the largest country in the world.
即it is said that结构和非谓语现在分词组合起来是否可以呢?
句子只是临时想的,
it is said in the passage that,having a population of 1.3 billion,china becomes the largest country in the world.
还有强调结构后面可以再有多个that吗?
比如it has shown that he is so strong that nobody can push him down.
it is said in the passage that he point out that....
是不是只要强调结构后面加一个完整的句子就正确呢?