This is episode 84 of 102 of Kung Fu Kid. Play it below, then continue straight into the next episode — the whole season is free and needs no account.
The closing stretch of the season, where the arc pays off.
Zhou Tianxiao, the supreme lord of the Northern Territory, conceals his identity and enters the prestigious Ning family in the capital as a live-in son-in-law, dismantling one conspiracy after another.