For the textbook of CHINESE100/100G, you may choose to buy a print copy from the Ubiq bookstore or an e-textbook from the publisher's website directly.
Integrated Chinese (Print)
The simplified version, Volume 1, Fourth Edition
Editor: Yuehua Liu and Tao-Chung Yao
Publisher: Cheng & Tsui Company
Year of publication: 2017
Available at Ubiq bookstore
Integrated Chinese (Web App)
The simplified version, Volume 1
Basic Edition (for at least 6 months): Includes Textbook, streaming audio, video and additional interactive content Available at: https://www.cheng-tsui.com/browse/integrated-chinese-4th-edition/integrated-chinese-4e-vol-1-chengtsui-web-app?id=21212