What is the name of the world’s longest expressway tunnel recently opened by China in the Xinjiang Uygur Autonomous Region?

The correct option is Tianshan Shengli Tunnel.

Step-by-Step Explanation:

1. Context & Location: The Tianshan Shengli Tunnel is a major infrastructure project located in the Xinjiang Uygur Autonomous Region of Northwestern China. It cuts through the Tianshan Mountains.

2. Key Significance: Measuring over 22 kilometers in length, it is recognized as the world's longest expressway tunnel, significantly shortening travel time across the rugged terrain of the Tianshan range.

3. Option Evaluation:
- Karakoram Mega Tunnel: Incorrect.
- Pamir Victory Tunnel: Incorrect.
- Tianshan Shengli Tunnel: Correct ("Shengli" translates to "Victory", making it the Tianshan Shengli / Victory Tunnel).
- Silk Route Express Tunnel: Incorrect.