Well, lets look at the approx trade China has with the countries and regions which could use CPEC instead of the slow sea routes. As shown below this is currently approximately $700 billion a year and will most likely increase to over a $1Trillion annually. This excludes any CPEC Indian trade should India decide to partner up for regional prosperity. It's a win win for Pakistan and China and the regional countries participating in CPEC trade.
If Pakistan charges 10% CPEC fee for the train transport of goods, that would equate to approximately $100 billion annually into the Pakistani coffers (which would grow over time) and excludes other direct benefits from CPEC resulting from investment, jobs, manufacturing, trade, exports, tourism etc. and excludes the indirect benefits of regional connectivity, cultural relationships, knowledge and skills transfers etc.
I am sure Pakistan gov can do more detailed research and calculations
to show CPEC train link is a great investment.
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