reporter: the ruangguru app's success took iman usman and his team by surprise. wadays they sometimes have difficulty finding suitable programmers and teachers. this rapid growth is also an organizational challenge, especially because the company wants to branch out. iman: we want to make sure that basic and secondary education becomes a lot more and more affordable. bubut other thanan that, we arae actually also developing other solutions that help them to get employed and get external support as well through an application that we call ruangjar, which is basically providing a lot of short courses and online training not only for students, but also for adults and young professionals. reporter: improving employment prospects is also good business. after all, there's little incentive for a good education if there's no work. but ththe idea of lilife-log learning seems to appeal to many young indonesians, as long as the lessons are varied and fun. host: and now from indonesia to china, where the ever-expanding wealthier classes are stepping up their spending on produ