Twenty-seven years ago today, on July 26, 1998 (June 4, 1998 in the lunar calendar), the CIH virus began to attack the United States. Chen Yinghao On July 26, 1998, a malignant virus called CIH began to attack the United States. The virus launched attacks on the BIOS and hard disk at the same time. On August 26, the CIH virus invaded China, causing serious losses. To this end, the Ministry of Public Security issued an emergency notice, and various anti-virus software manufacturers launched new versions of antivirus software. The author of the virus, Chen Yinghao (a Taiwanese college student), issued a public apology: The incident occurred at the end of May, and the virus first expanded rapidly from the dormitory to major websites. Because the network was well-connected, the virus was highly infectious, causing unexpected disasters... So far, on the 26th of each month, users of Windows 95/98 systems have begun to thoroughly check their computers before the virus attacks.