Lanshan district. Linyi lanshan district Huadong Plastic Market, Linyi Yifeng Sunshade Factory specializes in producing dust-proof sunshades, greenhouse sunshades, encrypted sunshades and anti-aging sunshades, also known as sunshades. It is a new protective covering material for agriculture, fishery, animal husbandry, windbreak and soil covering, which has been popularized in recent 10 years.