diff --git a/CHANGELOG.md b/CHANGELOG.md
index c04ff7c204..e07f1cc0d0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,10 @@
+Release v1.15.35 (2018-09-13)
+===
+
+### Service Client Updates
+* `service/polly`: Updates service API and documentation
+  * Amazon Polly adds Mandarin Chinese language support with new female voice - "Zhiyu"
+
 Release v1.15.34 (2018-09-12)
 ===
 
diff --git a/aws/version.go b/aws/version.go
index a354f26546..916c066a5c 100644
--- a/aws/version.go
+++ b/aws/version.go
@@ -5,4 +5,4 @@ package aws
 const SDKName = "aws-sdk-go"
 
 // SDKVersion is the version of this SDK
-const SDKVersion = "1.15.34"
+const SDKVersion = "1.15.35"
diff --git a/models/apis/polly/2016-06-10/api-2.json b/models/apis/polly/2016-06-10/api-2.json
index 22822d376e..610a99d8a1 100644
--- a/models/apis/polly/2016-06-10/api-2.json
+++ b/models/apis/polly/2016-06-10/api-2.json
@@ -320,6 +320,7 @@
     "LanguageCode":{
       "type":"string",
       "enum":[
+        "cmn-CN",
         "cy-GB",
         "da-DK",
         "de-DE",
@@ -777,7 +778,8 @@
         "Vicki",
         "Takumi",
         "Seoyeon",
-        "Aditi"
+        "Aditi",
+        "Zhiyu"
       ]
     },
     "VoiceList":{
diff --git a/models/apis/polly/2016-06-10/docs-2.json b/models/apis/polly/2016-06-10/docs-2.json
index e73b24c0f1..696c55d511 100644
--- a/models/apis/polly/2016-06-10/docs-2.json
+++ b/models/apis/polly/2016-06-10/docs-2.json
@@ -319,7 +319,7 @@
       "refs": {
         "StartSpeechSynthesisTaskInput$OutputFormat": "<p>The format in which the returned output will be encoded. For audio stream, this will be mp3, ogg_vorbis, or pcm. For speech marks, this will be json. </p>",
         "SynthesisTask$OutputFormat": "<p>The format in which the returned output will be encoded. For audio stream, this will be mp3, ogg_vorbis, or pcm. For speech marks, this will be json. </p>",
-        "SynthesizeSpeechInput$OutputFormat": "<p> The format in which the returned output will be encoded. For audio stream, this will be mp3, ogg_vorbis, or pcm. For speech marks, this will be json. </p>"
+        "SynthesizeSpeechInput$OutputFormat": "<p> The format in which the returned output will be encoded. For audio stream, this will be mp3, ogg_vorbis, or pcm. For speech marks, this will be json. </p> <p>When pcm is used, the content returned is audio/pcm in a signed 16-bit, 1 channel (mono), little-endian format. </p>"
       }
     },
     "OutputS3BucketName": {
diff --git a/service/polly/api.go b/service/polly/api.go
index 04a6c0e363..e5f56ebd4a 100644
--- a/service/polly/api.go
+++ b/service/polly/api.go
@@ -1948,6 +1948,9 @@ type SynthesizeSpeechInput struct {
 	// The format in which the returned output will be encoded. For audio stream,
 	// this will be mp3, ogg_vorbis, or pcm. For speech marks, this will be json.
 	//
+	// When pcm is used, the content returned is audio/pcm in a signed 16-bit, 1
+	// channel (mono), little-endian format.
+	//
 	// OutputFormat is a required field
 	OutputFormat *string `type:"string" required:"true" enum:"OutputFormat"`
 
@@ -2197,6 +2200,9 @@ const (
 )
 
 const (
+	// LanguageCodeCmnCn is a LanguageCode enum value
+	LanguageCodeCmnCn = "cmn-CN"
+
 	// LanguageCodeCyGb is a LanguageCode enum value
 	LanguageCodeCyGb = "cy-GB"
 
@@ -2485,4 +2491,7 @@ const (
 
 	// VoiceIdAditi is a VoiceId enum value
 	VoiceIdAditi = "Aditi"
+
+	// VoiceIdZhiyu is a VoiceId enum value
+	VoiceIdZhiyu = "Zhiyu"
 )