Monsta X’s music was very popular in China when they first started. After their debut in 2015, they quickly became famous in China, topping many charts and music sites like Youku and Tudou. This was partly because Starship Entertainment, their management company, had a partnership with Yuehua Entertainment, which helped them reach Chinese fans.
However, their popularity in China decreased somewhat after a ban on K-pop in the country. Despite this, Monsta X still participated in Chinese projects, such as the survival program “Heroes of Remix” in 2016, where they performed remixes of popular Chinese songs. This showed that they were still interested in connecting with their Chinese fans.
In recent years, Monsta X has focused more on the U.S. and Korean markets, which has led to significant success in those areas. For example, they have had many hits on the Billboard charts in the U.S. and have become more popular in Korea through various TV appearances and music releases.
Overall, while Monsta X was initially very popular in China, their focus has shifted to other markets in recent years.