Leia commented on The Water Outlaws by S. L. Huang
Lu Da's staff weights "60 jin". A Jin is a little more than a US pound, so it's about 54.5 pounds. Which seems heavy as fuck for a staff.
A modern Chinese Gun (Staff) is six feet long and an unspecified on Wikipedia thickness. At an inch thick, a six foot oak staff would be like, 2 pounds. Even an inch thick staff of pure lead (the most common "really heavy, yet fashionable" thing I can think of,) would only be 23 pounds.
Now, given this is wuxia, so fantasy, and I don't know what kinds of metals were available during the Song dynasty, it could be something fantastic rather than real, but were it real, it might be an inch and a half lead core with a quarter inch of iron around that for support.
That is fucking big.