People on the Sino-Indian border work just for work. It is their mission to protect the peace on the border. Serious issues are usually dealt with seriously, and they do not have much intersection with happy issues. Most of the time It was China who knew the Indian soldiers on the side.
On the contrary, the relationship between Pakistan and China is simply extraordinary. Just seeing that Pakistan was able to donate all its tents during the Wenchuan earthquake in China shows that Pakistan and China are very happy friends.