The opening ceremony officially began at 8:00 pm China Standard Time (UTC+8) on 8 August 2008 in the Beijing National Stadium. The number 8 is associated with prosperity and confidence in Chinese culture, and here it was a triple eight for the date and one extra for time (close to 08:08:08 pm). The ceremony was co-directed by Chinese filmmaker Zhang Yimou and Chinese choreographer Zhang Jigang and featured a cast of over 15,000 performers. The ceremony lasted over four hours and was reported to have cost over US$100 million to produce. UNGA President Miguel d’Escoto and leaders from 105 countries attended this ceremony.