K-pop is spreading rapidly in China.

Idol groups 4MINUTE, BEAST, G.NA and BTOB attended the "K-POP CRAZY CONCERT" in China, performing on August 2 for a total of 60,000 fans.

Each group showcased their impeccable performance skills for the large audience.

Rookie boy group BTOB sang its track "Beep Beep" as well as their other hits, accompanied by perfectly coordinated choreography. Member Im Hyun Sik also impressed fans with his fluent Chinese skills as he thanked fans for coming out and supporting them.

This was an opportunity for BTOB to get their names out into the Asian music industry and create a more solid fan base to further develop their K-pop career.

Solo artist G.NA grasped the hearts of male and female fans with her performances of her hits "Black & White," "Pretty Lingerie" and more. Local media took note of her amazing vocals and the perfect execution of the sultry dance routines that were performed along with the songs.

BEAST also received quite a bit of attention when they come on stage to greet fans and perform their recent tracks, including "Fiction" and "Good Luck." Their charismatic performances added to the overall craze and enthusiasm of the night as well.

Girl group 4MINUTE may have been one of the more well-known K-pop groups out of the four acts, as fans were spotted singing along to the tracks that the members performed. The girls sang their hit songs "HOT ISSUE," "What's Your Name?" and more during the course of the concert.

Fellow 4MINUTE member HyunA was noticeably absent from the picture that Sohyun posted on her Twitter account of the members on a plane with the caption, "We are going to China~."

Fans have suspected on social media that HyunA was too busy to attend the recent event due to the promotions for her solo track "Red."

Despite the absence of HyunA, 4MINUTE was supported by fans on Twitter who commented on Sohyun's picture with encouraging comments.

One Twitter user and 4MINUTE fan wrote, "Do well in your performances!" in support of the girls.