Like Bruce Lee, he uses kiais, which are used for (from Wiki):
-Priming oneself for combat, by "amping up."
-Protecting the upper body from a strike by providing an escape route for exhaled air.
-Protecting the lower body by rapidly contracting the transverse abdominals and other core muscles, shielding the internal organs.
-Providing solid abdominal support for striking techniques.
-Startling and demoralizing inexperienced or shy adversaries — especially at close quarters.
Bruce Lee used them especially for the latter, or so I've heard, so I presume that's why Liu Kang uses them.

Ah ok, cool. I didn't know it did all that, I thought it was just battle cries. I knew Liu was inspired in part by Bruce Lee, but I never knew why he yelled like that. Thanks.

I remember back in 1995 in one of the EGM magazines, they interviewed Ed Boon and John Tobias and had art for UMK3. I remember one of them said Liu Kang was supposed to be a Shaolin Monk but wound up resembling Bruce Lee as they said.

MK is similar to Enter the Dragon, a Bruce Lee film (one of his best!)

To be fair, in Enter the Dragon, Bruce's character is a Shaolin Monk.

I had forgotten about that Razor, the magazine I read said Liu Kang was supposed to look like a Shaolin Monk, but wound up resembling Bruce Lee.

I'm curious to know, when Liu Kang saved Earth's liberties and received the accolades, like the gift of slow ageing. Is this different from the natural Edenian method of ageing?

Yep. Edenians naturally have long life. Liu won the tournament and I guess the elder gods bestowed slow aging so that he'd still be young and vital in 50 years time for the next tournament. But he can still die

Why is he old in MKX then? Liu should still be young, even if MKX takes place a quarter of a century after MK9. We know Liu Kang was 24 when he won the initial championship. His almost unchangeable age would depend on how old he was after he won his 2nd championship. I'd estimate he was in his 30's, so theoretically he shouldn't of aged from then on (but Liu is currently grey-haired). As part of the offering for his triumphs, I wouldn't expect to see him elderly until many many years. However with the complexity of the outcome he appears to have regained youth as a revenant too.

I found that odd too. As long as Liu Kang is the Mortal Kombat champion he should still remain young. When I saw Liu Kang with gray hair I figured whoever came up with that concept at Netherealm studios completely overlooked the original plot line. Either way though, if you base the game off of the story line Liu Kang never aged when he became a revenant.

I don't like the treatment that they give Liu Kang. If they want to change his character and give him more of an edge with a dark side like they did in MKX, why don't they host another MK Tournament and have Liu Kang lose his title? Going into MKX and the team introduced us to a new generation of heroes I was hoping for a new tournament with Liu Kang as the final boss.

Is there a way for one of us to submit an application to Netherealm studios so we can create the story that the fans have wanted for over 20 years?

Ed Boon already explained that this is a what might have been scenario it is what he would look like if he was revived the same time as Scorpion, Sub-Zero, and Jax were.

Another explanation for Liu's age situation, in his other skins, is the elder gods enchantment bestowed upon him makes him younger, but he is still unrecognizably old and is therefore incognito. The Brazilian, classic and tournament Liu Kang skins in MKX show he isn't a senior, in appearance.