The talent agencies train new artists and bands for the K-pop industry. To make sure it is successful, they take over every part of the young person's career and life. They can spend more than $400,000 to train and launch a new artist. Through this practice of apprenticeship, which often lasts two years or more, trainees are taught to sing, learn professional choreography, sculpt and shape their bodies through exercise, and study multiple languages, all the while attending school. In order to get this money back, the artists are signed up to long contracts, with little money being paid. These have been described as slave contracts. The band Dong Bang Shin Ki or TVXQ were given a 13-year contract which the Korean courts have said was too long and had too many restrictions. With CD sales being low, and Internet sales making only a few cents from a song, most money is made through tours and selling merchandise.