World Team Olympiad in the WMSG but the constituent events of the Olympiad continue—Teams championships in Open and Women categories as part of the WMSG; in Seniors and Transnational categories as non-medal side events. World Team Olympiad The World Team Olympiad was a contract bridge meet organized by the World Bridge Federation every four years from 1960 to 2004. Its main events were world championships for national teams, always including one open and one restricted to women ("Open" and "Women" "categories" in WBF terms). A parallel event for seniors was inaugurated in 2000. Although the Olympiad has been discontinued, its main constituent championships
Chinese Chemistry Olympiad Chinese Chemistry Olympiad Chinese Chemistry Olympiad () is an annual academic competition held by Chinese Chemical Society. CAS changed its official Chinese name in February 2014, though its English translation remains the same. The first CChO was held in 1984, 16 years after IChO. The event has been held every year since then. China has selected excellent high school students to take part in IChO through the competition since 1987. It is considered to be the most difficult Chemistry exam throughout the world, the difficulty of Final round is much harder than IChO. The difficulty of the preliminary round is