[Joint Filing Agreement Lin Dong Lin Dong Crossvine Assets Limited Lin Dong Director Dong’s 2 Family Trust For and on behalf of HSBC International Trustee Limited, as trustee for Dong’s 2 Family Trust Andrew T. Chan, Danny W. K. Tsui Director, Associate Director] [CUSIP No. G84383101 1 NAMES OF REPORTING PERSONS 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP þ (a) o (b) 3 SEC USE ONLY 4]