BIG SLOW CHONKY SHIP, FAST TORPS. Do the math...
Also ever heard of targeted strike? The deck gun doesn't need to destroy a ship to sink just target the vulnerable spots to disable the ship. Then kill 'em with Harpoon or torps.
There was no escort at that moment if the Mustin decided to go full salvo then, the Liaoning would have been at the bottom of the ocean. That shows the level of competence PLAN sailors have if they let their Capital ship unguarded.
Maybe for evasion will be difficult for Liaoning because short distant from Mustin, but Liaoning can do countermeassure one of them like sonic masking and jamming.
Which vulnerable spot of Liaoning you want to target with deck gun?
Still no use; it could take time and thousands of bullet to damage it, while YJ12 will be very fast to destroy Mustin in less than 1 minute
Give me evidence of your claim, that Liaoning was not escorted. Please dont bring your past stupid assumption again because you should know that no one will send Carrier into open sea (esp in disputed area with strong enemy presence) without escort, even for newbie and stupid navy, meanwhile photo could have many blankspot
For sure Mustin will be certainly sunk by YJ12 or torpedo from J-15.