The "South China Morning Post", in a 2019 article, stated that already there is also some economical and cultural revolution happening recently within North Korea itself. It started in earnest in February 2018, during the Pyeongchang Winter Olympic Games, when top musicians from North Korea were sent to perform in South Korea. This included a female quintet who performed in black shorts and red tops. After two months, Supreme Leader Kim Jong-un saw the performance of South Korean girl group, Red Velvet. This is the first ever K-Pop show to be held in Pyongyang. The North Korean musicians that performed in South Korea were highly praised for their performance that leader Kim decided to send them to Beijing for another goodwill tour in January, 2019. Part of the revolution was the introduction of other cultures, including Western, which was previously believed to be vulgar and quite corrupt in the past, but is now slowly making its way to the North Korean people. Second-hand Harry Potter books can now be read at the National Library, and Bollywood films like the "Three Idiots" had just had a run in their cinemas. The changes have also found their way to the economic sector with factories that are also producing products that are associated more with the West, like Air Jordan shoes, for national consumption.