David A Graff, in his book, Medieval Chinese Warfare, 300-900 AD, writes that Emperor Yang of the Sui Dynasty recruited 30,000 javelin-men from a region called Lingnan on the southern coast of China. This was for a campaign against the Korean kingdom of Koguryo in the 7th century AD.

So whilst Chinese seemed to have preferred bows or crossbows for ranged warfare, the javelin could still be a component of their forces.