The technical problems of circular knitting machine for jacquard carpet produced by weft knitting method are as follows: 1. The knitting principle of tricolor jacquard cut carpet and the best design scheme of triangle knitting mechanism. 2. Design of jacquard control system and pattern preparation system for muffler production. Nantong Xinglong belt Machinery Co., Ltd. was established in 1954 and reformed in 1996. In May 2001, Nantong Fusheng Machinery Co., Ltd. was established with Nantong Xinglong line as the main body (accounting for 70% of the shares). The company covers an area of 87.75 mu, with a construction area of 32860 square meters. There are 358 employees, including 112 technical mufflers. The main products are jacquard knitting machine and shuttle embroidery machine. In addition to most provinces and cities in China, the products are also exported to Turkey, India, Pakistan, Greece, Vietnam, Chile and other countries. In 2006, the sales revenue was 134 million yuan, the profit was 26.16 million yuan, and the tax was 17 million yuan. Software development and computer control of computer level machine and computer seamless underwear machine.