When did Karry's agent, Liu Yang, come?

After the contract with Song He Media expires. After Karry's contract with Hege Media expired, she changed her agent, Liu Yang. The internal members of Karry Studio are responsible for Karry affairs, and the main force is also the staff of the studio. However, the publicity part will also be outsourced to another professional team. Fans are not familiar with many members of Karry Studio. One of them is Karry's assistant Mark, and the other is special agent Liu Yang.