The company stated, "Thank you to all the fans who continued to love and hold 10cm close to their heart. There will be a member change within the 10cm team. Back is June, when their contract was coming to an end, we started to discuss their contract renewal. However, Yoon Cheol Jong mentioned that he will be leaving the group due to personal health issues."
They continued, "To protect the name of 10cm, there will not be a new member. Thus, we decided Kwon Jung Yeol will be promoting alone. Even though it is disappointing that Yoon Cheol Jong will be leaving after seven years, we respect his decision and his health comes first."