The post contains answer to questions “Which pass connects Baltistan and Yarkand China? Which pass connects Skardu and Yarkand? Which two pass connects Pakistan with China?”
Which pass connects Baltistan and Yarkand China?
The important pass that connects Gilgit Baltistan in Pakistan with Yarkand in China is Muztagh Pass also sometimes called as Mustagh Pass.
The pass is located in Baltoro Muztagh range in the Karakoram Mountains.
Which two pass connects Pakistan with China?
The two important mountain passages that connects Pakistan with China are; Khunjerab Pass and Muztagh Pass.
Source: The above answer is based on information given by Wikipedia, World Atlas and Britannica.