My conclusion can be confirmed by everything Yang Kang did.
1) Yang Kang has been living in the royal family since he was a child, and his dream has always been for his parents to reconcile, he is a filial son, and of course he is a good guy.
2) Later, he learned of his life, and suddenly his father, whom he had always respected, was his enemy, so how would we have reacted if we were him? If you put yourself in his shoes and imagine, I think Yang Kang's choice is not wrong, is it? Later on, he chose to give up the glory and wealth and the "father" who raised him for 18 years, and preferred to follow his own father, who was worthless and had no feelings at all, so of course Yang Kang is a good person.
3) Later on, Yang Kang's parents died because of Wanyan Hongli, and Yang Kang was repeatedly oppressed in the society, and his heart fluctuated. If Yang Kang continues to live like this, not only will he not be able to avenge the death of his parents, but he will also spend the rest of his life living in poverty under the government's pursuit of him. But if Yang Kang go back to it, obviously, first of all, the future glory and wealth, food and clothing without worry (this point we do not despise, is not a good man must live a poor life? Can't he choose to live a good life? Is not it), and close to the Wanyan Honglie worry about revenge. Here can say he did not do too right, but never say he is a bad person because of this. I think it's right for him to go back to be the young prince, don't you think he can do a lot of things if he goes back, but if he doesn't, he can only wait for old age and death? I think Yang Kang is so, not only is he a good person, but he is also a smart person.
4) back, he wanted to find the right opportunity to take revenge, but he found Guo Jing too lucky, everywhere over himself (this is Yang Kang's is also the only point of shortcomings, jealousy, do not allow others to be better than their own strong, for the young call the wind and rain, all-powerful little prince, there is such a mentality is not too much, is not it right ah), but he had already accepted Guo Jing as a big brother, although inner But he has accepted Guo Jing as his elder brother, and although he is extremely jealous, he still wants to follow Guo Jing to learn the best martial arts, hoping that one day he can surpass Guo Jing (this is a positive thing to be enterprising, and everyone should support him). However, Guo Jing refused Yang Kang time and again, starting with the 18 Palms of the Descending Dragon, which Guo Jing said he had sworn not to teach, but Yang Kang was very angry but did not think too much of it, and just wanted to learn martial arts from other places to surpass Guo Jing. Until later Guo Jing learns the nine yin true sutra, but not good martial arts for the reason that once again rejected Yang Kang, this point I think is absolutely Guo Jing's wrong, the nine yin true sutra is the top martial arts martial arts people dream of, how can be bad it, even if Guo Jing think this martial arts is not good, but why he later to true sutra in the treatment of wounds to cure the one lamp Hong Qi himself, since it is an evil martial arts, how can he dare to use to cure the disease. Guo Jing's behavior made Yang Kang regard surpassing Guo Jing as his top priority, even more than the revenge of his parents. All these are caused by Yang Kang's jealousy, Guo Jing is also a big factor, people can't be sure of everything Guo Jing does just because they like him, most of what Guo Jing does is wrong when it comes to Yang Kang. Think about it, brothers would argue and even fight over small things, not to mention someone who has always claimed to be a big brother, but refuses to teach him martial arts. Yang Kang hated Guo Jing's behavior of trying to surpass him, his own jealousy was the internal cause, but Guo Jing was definitely the external cause in the dominant position. So Yang Kang is not a bad guy, and since he's not a bad guy, of course he's a good guy (even if he doesn't seem like a total good guy).
5) Later on, he tried his best to worship the West Poisoner as his teacher, kill the five monsters, and until the final duel with Guo Jing, he only accomplished his greatest ideal - to defeat Guo Jing, although he did a lot of wrong things, but when a person is blinded by jealousy, he can't help but do some wrong things. We think about Yang Kang to others is not always very good, for example, in the Temple of the iron gun in the West Poison to kill the silly nun, Yang Kang out to stop, this is why, the silly nun is not only silly and Yang Kang absolutely nothing to do, the reason is Yang Kang is a good person, even if it is not related to the people he can also lend a helping hand, but he wants to defeat Guo Jing will be followed by the West Poison, you can't offend the West Poison, the problem for the silly nun naturally can't be too tough, this explains why he is just to defeat Guo Jing, but he is also a good person. This also explains why he just exported his words to stop it, but did not make a move to stop it. Yang Kang is definitely a good person, it's just that his jealousy makes him unable to distinguish between good and bad.
6) Do you remember what he said when he killed Wanyan Honglie, in fact, he never forgot that he was a descendant of the Yang family and his parents' revenge. You must have remembered Yang Kang's ending, this is after he finally really accepted Guo Jing as his big brother, his eyes blinded by jealousy were finally opened, and he finally begged for his death to the Western Poison. Sure enough, he's a good guy.
In fact, to summarize the whole episode, at the beginning of Yang Kang is the real himself, and then was blinded by jealousy, but he is still very good to people other than Guo Jing (in fact, he also wanted to be good to Guo Jing, just....) ), and it wasn't until the end when Yang Kang, who begged for death, changed back into that original real Yang Kang. In fact, Yang Kang is indeed a good person.