This document provides information about CHIYU, an access control company established in 2000 in Taiwan that focuses on access control, time attendance, and serial converters. It offers a 2-year warranty and after-sales support. The document describes CHIYU's quality control process, including outsourced manufacturing, testing, assembly, quality checks, and packing. It also lists CHIYU's biometrics and card reader product lines and provides examples of their implementation in sites in Japan and Taiwan, including government offices, universities, and enterprises.