CIIC:Selected anniversaries/November 11
1993: Singles Day, which falls on Nov. 11 – whose date is four ones – started to be celebrated by singles at Nanjing University, Jiangsu Province.
1994: The widest broadband seismograph in the world was developed in China. The JCZ-1 ultra-broadband seismometer, as it was called, is extremely sensitive and able to sense a wide array of scopes, from high-frequency seismic waves to wide frequencies of solid tides.
2009: Alibaba Group, operator of e-commerce platforms Taobao and Tmall, launched Double Eleven Shopping Festival in Tmall.com.