Musical elements ltd., founded in 2009, is a well-known interactive entertainment company that operates mainly in the field of game research and development and also includes animation works, authorized goods, music, concerts, radio dramas, etc. By the end of 2015, the musical element had nearly 700 employees, with its headquarters in beijing, offices and research and development centres in tokyo, shanghai and kyoto, under the banners of the idol dream festival, happy fun, seafront recreation, merc storia, ensemble stars, and many other best-selling products, as well as star dream handers animation and cartoon images, the disappearing motion. Among them, happy fun is a national game that is very popular with players. The idol festival (known as ensemblestars) is a hand-swap by women to male idols developed by the musical element company. The game revolves around the hot theme of "youth, illustrated, high school students", the play's script is performed daily by the novelist, and the whole picture of the game is very fresh. The game included 36 handsome men of different styles, such as majestic, black, gentle, and sun, who formed a group of 10 different styles of high-faced idols at the school of men's idol cultivation "the school of private dreams", and who would play the leading role in music production at the private dreams college and build a strong group of icons together with 37 of them. The game uses the "live 2d" technique, and the role-setting in the game is a 2d image of the "live 2d" transformation based on a 3d model, and the role movement will be much more dynamic. The game is full of players and has a beautiful voice, with 35 great voices, including green river light, yuyuki, koshihara and yuyuki. Starting in the second half of 2010, the musical elements then launched various social games, such as " my kingdom " , " my legend " , " heroes wars " . In early 2011, musical elements began exploring mobile games. The happy aquarium ios version came online in october 2011 and quickly got the attention of players. In the area of popular leisure games, the musical elements launched two other leisure games in the happy series. In june 2012, happy bubble cats landed in the qqqs space, with 4 million active users per day, maintaining the first place in the social game on the platform for six months. Another version of the pc version, happy delight, landed in the q-zone and qqq game halls in august 2013 and the year's high-profile active users have crossed the six million mark. At the beginning of 2014, the mobile version of happy depression came online and was repeatedly recommended by app store and the grand andre platforms, not only as a game at the top of the list of downloads from app store in china, but also as a leader in the pursuit of the goals and the downloading of the double list, which continued for more than six months。