Complex sentence: EXO first did a performance of the song during EXO's pre-debut showcase on March 31,2012 in Seoul, South Korea, The single has topped the charts at number one in China.
Split into simpler sentences: EXO first did a performance of the song during EXO's pre-debut showcase on March 31,2012 in Seoul, South Korea. The song has topped the charts at number one in China.