Printing color flyers requires color printers, including six-open (about 2.5 million), four-open (about 5 million) and folio (about 8 million) Heidelberg printers. Komori's is cheaper, but Heidelberg is still considered. There are about 20 thousand machines for printing bills in China, and GTO is not suitable for printing bills. Liang Ming 500 K-NP imported second-hand factory machinery, about 50,000-70,000.