Exhibit 2.1 SHARE PURCHASE AGREEMENT dated as of January 20, 2002 by and among AsiaInfo Holdings, Inc., Bonson Information Technology Holdings LimitedShare Purchase Agreement • February 21st, 2002 • Asiainfo Holdings Inc • Services-business services, nec • New York
Exhibit 2.2 Letter Agreement AsiaInfo Holdings, Inc. 4/th/ Floor, Zhongdian Information Tower 6 Zhongguanan South Street Haidian District Beijing 100086, China February 5, 2002 Ladies and Gentlemen: Reference is made to the Share Purchase Agreement...Letter Agreement • February 21st, 2002 • Asiainfo Holdings Inc • Services-business services, nec
