In retrospect, it was the wrong time to open a new data processing center in this city.

请问老师，句中不定式to open a new data processing center in this city 的形式主语是it吗？

如果是，则为：to open a new data processing center in this city was the wrong time.

to open a new data processing center in this city怎么可以等于(was)“时机”呢（the wrong time）？