Telecom networks in Guangdong, southern China, experienced a major failure last night, with internet and other services cut for nearly four hours.
The outage, which was fixed by around 10pm, also affected internet users in Shanghai and Sichuan, who complained of slow connections.
China Telecom has not explained the outage, which mainland press reports described as a "large-scale breakdown". Un-named executives at the telco said it was because of "router" or "server" problems.
Hong Kong\'s scmp.com reported that Guangzhou and Shenzhen residents could not book air tickets or buy lottery tickets from retail outlets, while the 114 telephone directory service also went down.
The outage began when users in Guangzhou and Shenzhen complained they could not log on to IM services from around 5.45pm, scmp.com said. A complete blackout followed.
that crashed 100,000 web sites, caused by a hacker attack through a vulnerability in a Baofeng media player.