Strong Bones Come From Hard Knocks in Chinese / Japanese...

不磕不碰骨頭不硬 is a Chinese proverb that literally translates as: Without being knocked around a bit, [one's] bones won't become hard.

Figuratively, this means: One can't become strong without first being tempered by “hard knocks.”

While true for everyone, this sounds like the “Iron Body” form of Kung Fu, where practitioners' bodies are beaten (and often bone fractured) in order to become stronger.
For the rest of us, this is just about how we can be tempered and build character through the hardships in our lives.

This is not a common title for a wall scroll in China.