On August 12, the group started their promotions in China with the song "So Crazy (Chinese Version)" and also released a music video.

[3] The EP entered at number 8 on the chart for the month of August 2015, with 20,629 physical copies.

[4] The EP sold 20,695 physical copies in 2015, placing at number 74 for the year-end chart.

[5] So Crazy was a huge success in China, topping YinYueTai, the country's largest video streaming platform.

The song also holds the record for the first and T-ara as the only Korean girl group to achieve a perfect 100% score on the said chart.