how long can p>GEC go?

a: GEC has issued a total of 8 billion coins, which will be reduced by half every five years, and it will take about 15 years to dig up 8 billion coins. GEC was launched by the World Environmental Entrepreneurship Foundation on February 17, 217, and it will be five years until February 17, 222. Now it is the first five years, and the amount of coins dug is also the highest, so GEC has just begun.