The Chinese bought the ex-Varyag (now named) Liaoning and revamped her as their first carrier. One of the major changes they made (that is currently being done to the Kuznetsov) is the removal of missile canisters on the deck, of which this class has 12 Vertical launch system cells for Granit missiles.
Removing the VLS cells, along with all associated hardware entails substantial changes below deck, but also opens up all that space for a larger hangar (which means it can carry more missiles). It's presence on the Kuznetsov is indicative of how the Soviets (now the Russians) utilize their crriers differently than the US with its supercarriers. It's a different concept really.
But the Chinese intend to builds US-style supercarriers (in fact, they are underway building one now, the Type 002). They first needed to learn how to have, handle and manage a carrier. So they bought the Liaoning and massively revamped it. But it's really just a training ship and a show-of-force ship. This led to them building the Type 001A from scratch, which is a modified Liaoning design. They look similar but the Type-001A has a larger flight deck, larger hanger, more storage space and redesigned island. But it's still heavily derived from the Liaoning.
To put it simply, with the Liaoning, China learned how to own a carrier. With the Liaoning-derived Type-001A, they learned how to build a carrier. Both will likely see limited active duty service.
All of this is part of their plan to build the Type-002, which will have an Electro Magnetic Aircraft Launch system like the USS Gerald R Ford, rather than a ski-jump, and be comparable (but smaller) to modern US Supercarriers. It will have similar dimensions to a Nimitz or Ford class, but have a lesser the displacement.
From the Center from Strategic International Studies (modern carriers are build modularly then lifted into place).
.
It's worth stating though it's taken China nearly 25 ears to get to that point. The US has been building big deck carriers non-stop since the 1950s and that has lead to a rather quick turnaround for them. The US work force can turn them around in about 4 years. The speed is mostly a factor of money spent employing workers and number of shifts per day.
The CVN-79 USS John F Kennedy
July 2017
December 7th 2019
(note: it still needs to be outfitted with all its radars, computers, weapons, catapults, wires and so forth, which will take another couple of years, largely due to funding limits)