Like maybe it was made back then to psyche people out.... But ...arent they hamming this stuff up a little. Often in Chinese war movies, usually i think they have some beef with the Japanese. But... i really doubt on the battle field that this is not something you can counter, bam destroy that red cloth, spear, counter, attack guy etc. Like just seems like an overhammed propaganda stuff. I really doubt this stuff has huge effect.
Just seems a tad bit hammed up. Just saying. Its alright... but its not Oh WOW BLIND, cant see oh no. Like i just feel... its a little hammed up is what i mean.
https://en.wikipedia.org/wiki/Qiang_(spear)
Edit: I mean historic reasons seems to have its benefit, like for example "to stop the flow of blood getting onto the wood" (that does seem practical and makes sense and useful just to mention a few), but the movies really feel like they ham it up that its just no way you can counter it, like i feel like its hammed up in those instances. Just from what i have seen
Just one example of a regular footage of this spear atleast, not a movie, just i think to show an example of the use of the spear
https://www.youtube.com/watch?v=87FUTijFyfw