This is episode 31 of 55 of Breakthrough I: Born to Fight. Play it below, then continue straight into the next episode — the whole season is free and needs no account.
The middle of the season, where the conflict escalates.
Orphaned Xiaosui flees greedy relatives, finds her grandpa, and trains in martial arts. Years later, she conquers bullies, masters the family spear, and rises to world champion.