Complex sentence: The drama reached viewership ratings as high as 2%, which was described to be "a huge success in a country of 1.3 billion", and recorded more than 10 billion hits through various Chinese online videos sites, reflecting Yoona's popularity in China.
Split into simpler sentences: The drama reached viewership ratings as high as 2%, which was described to be "a huge success in a country of 1.3 billion". It also recorded more than 10 billion hits through various Chinese online videos sites, reflecting Yoona's popularity in China.