Lu Ban
Ramming vessels were also attested to in other Chinese documents, including the "Shi Ming" dictionary of c. 100 AD written by Liu Xi. The Chinese also used a large iron t-shaped hook connected to a spar to pin retreating ships down, as described in the "Mozi" book compiled in the 4th century BC. This was discussed in a dialogue between Mozi and Lu Ban in 445 BC (when Lu traveled to the State of Chu from the State of Lu), as the hook-and-spar technique made standard on all Chu warships was given as the reason why the Yue navy lost in battle to Chu.