Are Sean and Qin Li the same company?

No. Qin Li and Sean are not from a brokerage company. Qin Li's brokerage firm is Shanghai Qin Li Ying Shi Culture Studio, Xiao Enzhong's brokerage firm is Xiamen Midsummer Moon Culture Media Co., Ltd., and Xiao Enzhong's brokerage firm is Shanghai Qin Li Ying Shi Culture Studio and Xiamen Midsummer Moon Culture Media Co., Ltd.