Ngati bizinesi yapamwamba kwambiri ya Tech, St.cera Co., LTD. . St.cara kale omwe amadziwika kuti Shenzhen Sellton Technology Co., Ltd., Omwe amapezeka mu 2008. Mu 2019, St.9, St.9, St.9 Imakwirira malo pafupifupi 30 maekala ndi malo omanga pafupifupi 25,000 mita. Okonzeka ndi akatswiri apakhomo apamwamba ndi mainjiniya osiyanasiyana popanga, st.cera imapanga ma R & D, amapanga ndi msika.