[CUSIP No. 86737M 100 Joint Filing Agreement CUSIP No. 86737M 100 Yuqiang Deng Yuqiang Deng Freedom First Holdings Limited Yuqiang Deng Director Credit Suisse Trust Limited Camille Le Conte Geoffrey Le Poidevin Authorised Signatory DENG Holdings Limited Camille Le Conte Geoffrey Le Poidevin Authorised Signatory EX-99.1 2 d871207dex991.htm EX-99.1] [CUSIP No. 86737M 100 1 Names of reporting persons Yuqiang Deng 2 Check the appropriate box if a member of a group x ¨ (a) 3 SEC use only 4 Citizenship or place of organization People’s Republic of China Number of shares beneficially owned by each reporting person with: 5 Sole voting power (1) 7,014,034 Class A ordinary shares 6]