Wang Kai was one of the most outstanding candidates in the Dragon Soul unit before Lin Fei left. If Lin Fei hadn't left the Dragon Soul unit, it's imaginable that Lin Fei would have definitely cultivated Wang Kai as his trusted aide.
What a pity.
After Lin Fei left the Dragon Soul unit, Wang Kai, upon finding out, also chose to leave. He kept searching for Lin Fei's whereabouts, simply because Lin Fei had once taught him in the team.
In Lin Fei's words, this kid Wang Kai is good in every way except that he values gratitude too much, which is not good.
As the saying goes, "Too much of anything is bad." Originally, valuing gratitude is a good thing, but Wang Kai values it so heavily that as long as someone treats him well, he feels obliged to repay them. He shares a similar fate with Lin Fei, with both parents deceased, and joined the army to avenge them.
