[[Remainder of this page has been left intentionally blank.] 11 Lin Dong Lin Dong Crossvine Assets Limited Dong’s 2 Family Trust For and on behalf of HSBC International Trustee Limited For and on behalf of 12 EX-1.A 2 h01034exv1wa.htm EX-A JOINT FILING AGREEMENT] [CUSIP No. G84383101 1 NAMES OF REPORTING PERSONS: I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY): 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS): þ (a) o (b) 3 SEC USE ONLY:]

[[Remainder of this page has been left intentionally blank.] 11 Defu Dong Defu Dong Oasis Land Limited Defu Dong Director Dong’s Family Trust For and on behalf of HSBC International Trustee Limited, as trustee for Dong’s Family Trust Andrew T. Chan, Danny W. K. Tsui] [CUSIP No. G84383101 1 NAMES OF REPORTING PERSONS: I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY): 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS): þ (a) o (b) 3 SEC USE ONLY:]

[Description A Joint Filing Agreement 11 [Remainder of this page has been left intentionally blank.] 12 Defu Dong Defu Dong Helio Glaze Limited Defu Dong Director Huo’s Offshore Trust For and on behalf of HSBC International Trustee Limited, as trustee for Huo’s Offshore Trust] [CUSIP No. G84383101 1 NAMES OF REPORTING PERSONS: I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY): 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS): þ (a) o (b) 3 SEC USE ONLY:]