Yi Cheng Forging Co., Ltd. (Original Taiwan Chyuan Yi Metal Industrial) was established at Taoyuan, Taiwan in 1987. It is one of manufactures that professionally make speaker T-yoke during the earliest period of speaker. Now YCF not only focus on speaker T-yoke, but also developed some products of cold forging after a hard time. Because of the uncertain environment and intense competition to confront the expectantly and unexpectedly varied challenges, we will keep learn new technologies. Finding new methods and new ideas promote the products to satisfy the needs of clients.