老师：您好！以下两句话我不太明白，烦请您指导，谢谢！

(1) Understanding leads to trust. Today, I would like to speak to you about China’s development strategy and its future against the backdrop of the evolution of the Chinese civilization and China’s current development endeavor. I hope this will help you gain a better understanding of China.

疑问：句中为何用的是 its 而不是 it’s 呢？

(2) Vast as it is, the Pacific Ocean has not stood in the way of exchanges and cooperation between our two peoples over the past two hundred years, and many moving episodes of mutual learning and mutual help between our two peoples who represent different civilizations have been recorded.

疑问：People已经是复数了，为什么在这句话中要用 peoples 呢？

(3) 老师，有时候我提问发表时，界面会跳出 illegal operation，这是为何呀 ？

 Thanks a lot.