how to go to zhangmutou from guangzhou and i need to purchase sweaters from there.where i can find sweater factories there.

At Guangzhou Railway Station, there are bullet trains to Zhangmutou and it takes around an hour!

At Zhangmutou, I know the Hengsheng and Xingxin Clothing Factories, where you may find what you want! Go there and ask local people about the exact location. It won't be that hard to spot.