In the upper right corner of the most prominent building north of Shennan Boulevard in Shenzhen's National Hi-Tech Zone, the "IIPC" (the abbreviation of IBM's holding company "Great Wall International System Technology (Shenzhen) Co., Ltd.") logo became famous due to the case in late 2004 when IBM sold its PC business as a whole. Now, it has been replaced by "ISTC" (Great Wall International System Technology (Shenzhen) Co., Ltd., an IBM holding company).