While enjoying a moment of peace and tranquility, Chin was met by a little boy. The boy had heard much about Chin, and he would feel honored if Chin would teach him. Under the dizzying effects of the "sake", Chin accepts the boy as his student, and when Chin finally realized what he did, he had no other choice but to keep his promise. Chin then teaches the boy named Sie Kensou, and is surprised that Kensou is a host of incredible psychic powers, while Chin himself masters himself in the art of the Drunken Monkey, a fighting style which tends to be very confused and mortal, since the opponent is lead into believing that the fighter is drunk, and is then nailed by several martial arts moves.

Kensou grew to be a spirited young man, and Chin was so revitalized by the attitude of Kensou, that he found spirit once again to keep on fighting. Much like the son he never had, Kensou and Chin always wandered together around China and other countries around the Asian area, in order to keep their training constant. One day, both traveled to Japan in a training journey. They soon found a competitor in a form of a bulky man. While Chin just sat by and smoked his pipe, Kensou had to deal with the strongman alone. However, both did not count on the help of a ceratin somebody, who blew the big bully away. Both turned around to see a girl in a Japanese school uniform. She introduced herself as Athena Asamiya, fighter of justice! Athena wanted both Kensou and Chin to help her against the crime in town, and both accepted, but Chin was reluctant until he saw Kensou's inmediate interest in Athena. Seeing how his boy became a young man, Chin considered it to be fun, and that he would tag along awhile.

The trio, quickly to be known as the Psycho Soldiers (mostly, because Athena and Kensou possesed psychic powers), made a lot of remarkable feats around Japan, thwarting crime wherever it would surge. Chin, however, did not participate too much in the fights: he was happy just training the both youngsters, and was proud of their evolution as fighters. Being a follower of the old rules of fighting, Chin induced Athena and Kensou the principles of the true meaning of fight, and what can somebody take from the fights.

In 1994, the team was invited to the first King of Fighters tournament which introduced the team battle concept. Chin once again accompanied the youngsters, and demostrated his skillful fighting style. However, sometimes, the "sake" reached up to Chin's head, and then you really wouldn't know if Chin was fighting seriously, or if he was just fooling around! However, Chin was never blind at the evil at work in every tournament, so that's why before every tournament, Chin always trains Athena and Kensou, as well as himself, very hard to be able to face the evil forces. Chin soon recognized the power of Orochi at work, and warned the teenagers. All three proposed to fight the evil power to the end.

However, since the fights of the Psycho Soldiers have become so popular, thousands of fans gathered around the group. Seeing this, Chin feared the young children would stray from the real sense of battle. So, told them not to enter the King of Fighters tournament in 1997. However, a fan letter from a certain Kaori to Athena cheered the two young fighters very much, and Chin had no other option but to accept to enter as well, but admiring the spirit of the two youngsters. They would fight together for mankind...until the end!

Almost right after the final battle with Orochi, and after peace settled somewhat, Chin encountered a little kid named Bao. He was very young...perhaps even younger than Kensou the first time he met him. Feeling pity for the child, he decided to bring him to his home with his wife, and give him shelter for awhile. However, as of late, Chin had noticed two very exceptional cases: the impressive psychic powers of Bao, and the loss of such powers from Kensou. Both curious and worried, Chin decides to train Bao in the basics of martial arts, while he tries to train Kensou in new techniques that no longer require Psycho Power. The results would soon be appreciated at the fifth King of Fighters tournament....

Always aware of the evil at work behind the curtains of the tournament, Chin keeps silent, not to distract the youngsters during the battles. However, the evil deeds of Krizalid becomes more and more evident by the hour as the tournament advances, so Chin has no other choice but to lead his disciples to the location of the evil source. However, the explosion of the base obligates the Psycho Soldiers to escape. Chin and Bao manage to escape, but Athena and Kensou lag behind...Chin refuses to believe that the two teenagers died beneath the ruins of the underground base. As if the heavens would have heard him, a super-psycho charged Kensou emerges from the ruins, Athena in his arms. Just in that moment, both Bao and Kensou pass out. Chin is surprised by this fact, as he begins to investigate the bond between the two powers of his two adoptive students....which leads to a certain term..."the worst day in history".

Despite his worries about Bao, and the new menace of the NESTS cartel in the King of Fighters tournament, Chin finds himself more inspired than ever, due to the excitement of his young disciples in anticipation of the next King of Fighters tournament in the year 2000. Also cheered by their eternal fan and inspirator, Kaori, Chin trains with new vigor in order to help his disciple's intentions to vanquish the NESTS cartel once and for all. This, of course, involves lots of drinking and sleeping by Chin!

After the fights end in the tournament, Chin and his youngsters receive the awaited notice: NESTS is now hiding out in Southtown, where the finals will take place! Chin is reluctant about risking their lives by going to that hellhole, but the hopes in the eyes of the children raises his spirit, and decides to lend a helping hand. However, upon reaching Southtown, they find out that it has been reduced to dust. Chin wonders about the true fate of humanity, if really inclined towards destruction, as Southtown was. No time for moaning, though, as Chin and the others spot a shining object in the sky. It turns out to be the trashed Zero Cannon, fallen from outer space. However, the Cannon is not yet completely disabled. Out of control, the Zero Cannon fires several shots, one headed directly at Chin and his disciples!

Chin urges his children to hide, but suprisingly enough, Bao takes the initiative and leaps to meet the blast head-on. Chin desperately shouts for Bao to come back, and not allow his young life to extinguish like this. But Bao has already made up his mind: he faces the beam, and receives the explosion directly. It looks bad, but Bao, in a suprising manuever, absorbs the impact of the laser! This refreshes Chin, but not for long, as Bao silently falls to the ground.

Chin is worried about Bao's fate. He doesn't react to Athena's healing powers, and Chin is faced with the guilt of being able to lose one of his disciples at such a young age. In an unexpected outcome, Kensou touches Bao closely, and absorbs his psychic powers in a huge blast. Chin is overwhelmed about Kensou's new psychic powers, but Bao's shape is bad. This teaches Chin a valuable lesson about life: a young, yet fulfilled, life is better than a long one.

As one year flies by, Chin watches over the progress of Kensou and Bao. Bao has apparently recovered faster than last year, but now he suffers the same symptoms that Kensou did the last couple of years: his psychic powers were slowly vanishing. Did it had anything to do with Kensou's "kiss of life" last year to save Bao? On the other hand, Kensou seems to have returned to his original state, with his psychic powers back to full again. Chin smells trouble as NESTS steps forth from the shadows to host the next King of Fighters tournament. It seems that NESTS is planning to give their final step towards world domination. Chin has no other choice but to rely on his students as he always has, and hope he can help them out in order to save the world for the future!

Old age doesn't stop Chin, as he continues to be a great asset to the group of psychic warriors as they participate in the new tournament. Chin's dream of finally watching the fall of NESTS comes true as the space station of NESTS crashes down to the sea. Chin puts special attention in Kensou and Bao, who far from feeling ill, are filled with life and enthusiasm. Chin wonders why there is a new feeling to Kensou's psychic aura, as if something totally new was arising in Kensou's body. What could be the end of this puzzle? Chin hopes he can live long enough to resolve what's going between the shared powers of Kensou and Bao.

Chin is sometimes very distracted, and once in awhile, he gets so dead drunk, nobody can tell what he'll do next. However, Chin is a jolly man, and since he always takes fighting as a sort of game (thanks in part to all that "sake"), he is always so cheerful, dancing, smoking, and most of all, drinking! However, he uses all resources possible, such as using his own sake jug, and igniting the sake with his inner power so that he becomes a walking flamethrower! Chin also likes to accompany Athena's singing with his drums, in which he is also very skillful at.