One criminal named Mao in the First Prison of Hebei Province has made three major inventions and holds Chinese patent rights for them, winning public approval and a reduced sentence for himself in accordance with the law.

• 河北省第一监狱罪犯毛某在劳动改造中创造了三项重要发明，并获得了国家的专利，受到了社会的好评，同时得到依法减刑的奖励。