It feels sorry to hear that you did not pass this paper. If you don't mind, I will put forward some flaws and mistakes.

1. Although your introduction was good, it was not very powerful or convincing. You should have made it general.

2. In heading (b) you can write that CPEC is landmark project of OBOR, which is likely to compete with other large trade partnerships.

3. Heading (c) is good but it can be better to write CPEC will stabilize underdeveloped areas of the country and region by bringing economic prosperity in those areas.

4. In heading e and f, you targeted specific countries. Instead, you could have written that CPEC has the ability to upset current regional setup and redraw a new one. For example, CPEC can change energy politics and security setup in the region. Something like this.

5. Other points are good. But you could have made it more organised by dividing it into three sub-headings: the game changer for Pakistan, region and world.

I hope you will not mind as a junior student is evaluating your essay.