It is the second time that I have been to Bingjing.这是强调句式还是定语从句?

问题描述:

It is the second time that I have been to Bingjing.这是强调句式还是定语从句?
不是强调句式,是什么句式?从语法角度能说明吗?

固定用法~
It is the first / second time.that后加have+过去分词.
而且最好是用现在完成时~
eg.It is my first / second time that I have seen this book.