On social media showing her performing martial arts like professionals, having spent nine decades in training on fighting. Several footage showed grandma Hexian fighting a man in 40s, using a big weapon like a stick.
Along with brushing up on her own techniques, she also teaches classes.  
One photograph shows her instructing a group of younger students.
They obediently mimic her moves as she leads the way with a stern look on her face and fists clenched.
Zhang has said over the years her physical prowess has helped keep bullies in 
check and keep 'other rascals in their place'. 
It appears her passion for martial arts has passed to the next generation and her son, Feng Chuanyin, is also a practitioner. 
Zhang, who is a widow, encourages everyone to go out and give kung fu a go. 
Along with helping her to fight off enemies, she said its also responsible for her strength and good health.