Located in Taihe industrial park, Yifan total covers an area of 53000 square meters. It has natural menthol product processing line, Lamivudine and intermediate production line. The natural menthol product processing factory has many production lines, such as menthol crystal, peppermint oil and so on. With annual output of natural menthol crystal 1200 tons, natural peppermint oil 500 tons. The factory has a large-scale production workshop. The production technology and equipment are in the leading level among domestic. The production line of natural menthol crystal, natural peppermint  oil and Lamivudine is according to the GMP specifications, with advanced equipment and professional technical personnel.