Over the next 1000 years, this shuttlecock game spread throughout Asia, acquiring a variety of names along the way. Jianzi has been played since the Han dynasty (206 BC–220 AD), and was popular during the Six Dynasties period and the Sui and Tang dynasties. Thus the game has a history of two thousand years. Several ancient books attest to its being played. Jianzi came to Europe in 1936, when a Chinese athlete from the province of Jiangsu performed a demonstration at the 1936 Summer Olympics in Berlin. In Germany and other countries people began to learn and play the sport, now called "shuttlecock". In June 1961, a film about the sport called "The Flying Feather" was made by the Chinese central news agency, winning a gold medal at an international film festival. In 1963, jianzi was taught by teachers in elementary school so that it became even more popular. Well known in Asia, the game has been gaining popularity in Europe. The International Shuttlecock Federation (ISF) was founded in 1999. The first world championship was organized by Hungary in Újszász in 2000. Until then, various countries took turns organizing championships. The sport continues to receive greater recognition, and was included as a sport in the 2003 Southeast Asian Games and in the Chinese National Peasants' Games. Among the members of ISF are China, Taiwan, Finland, Germany, the Netherlands, Hungary, Laos, Vietnam, Greece, France, Romania, and Serbia. Vietnam is generally considered best, having won the world championship for ten consecutive years. While in Europe, Hungary and Germany are strongest. On 11 August 2003, delegates from Finland, France, Germany, Greece, Hungary, Romania, and Serbia founded the Shuttlecock Federation of Europe (S.F.E.) in Ujszasz (Hungary). After being invented in 2009, Chinese JJJ got much faster spreading all over China due to its techniques similar to football. In June 2010, Chinese JJJ's "The First Beijing Invitational Tournament" held, with players from more than 10 countries participating. In 2011, the first formal Chinese JJJ Championship will hold in province Shandong, and a couple of other provinces are planned to follow. In August 2011, an American company released a toy called Kikbo based on jianzi. In 2013, a Hong Kong company released KickShuttle. It is a form of shuttlecock not made of feather with similar weight. Playing shuttlecock is a vigorous aerobic exercise that builds hand-eye coordination and provides the health benefits of any active sport.