[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:]

[[Remainder of this page has been left intentionally blank.] 12 Hongmei Yue Hongmei Yue Bright Garnet Limited Liu’s Offshore Trust For and on behalf of HSBC International Trustee Limited, as trustee for Liu’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:]

[[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:]