Won't take 5 years as that moves us past Made in China 2025 schedule. Remember they have unlimited funding now. The only limit is talent.
This is not the Great Leap Forward in integrated circuits for China.
These fabs must be commercially viable.
How many additional fabs does China need?
At least, let's say 10 big fabs, say for argument's sake. And these 10 big fabs will supply 70% or more of Chinese internal demand for chips.
It probably will take 2 years to build a fab. That TELSA factory in Shanghai was built as fast as any factory was built and that took 9 months and few more months for production to start.
They got to build the factory, then install all the specialized equipment to be ordered. That equipment is really expensive and not bought off the shelf. Put in the order, and the supplier will give a delivery date while they assemble that machine.
After all of that is done, then they test out the systems to make sure it all works. Then the customer must be lined up with their orders.
If there are no customers, or customers give small orders, then all those billions going down the drain.
It is not practical to build all these fabs at once. It is not the Great Leap Forward in fabs.
Build all this capacity at once, all within 2 years, your customers may be hesitant.
Better to build the fabs with spaced out time lines.
That way the market can adjust and make their plans for a seamless transition.
Also, if they build all 10 of their fabs at once, then someone makes another breakthrough during the construction, or when just finishing building the fab and news of a better tech emerges, then we are talking Great Leap Forward type economic mismanagement.
It is just how it works.
We can see how this story will drag on for some other players, as they know they still got a chance.