The earliest down jacket in China was made by Yaya Joint-stock Company, formerly known as * * * Green Down Products Factory. * * * Qingcheng Mountain was a wasteland at that time, with many ducks and many feathers. * * * The predecessors of Green Ken Farm saw that American soldiers' sleeping bags were made of down, so they came back to study the production of down jackets. During Gorbachev's visit to China, two down jackets were specially made for Gorbachev as a national gift. This is the story of the birth of the first down jacket in China history, the white fox fur collar, which is still very fashionable.