主题：语音朗读 选择语音库问题

请教，我如何恒定选择中文为语音库，  请问一下格式对么，测试报错，请教如何修改

Dim Speaker As New DotNetSpeech.SpVoice()
Dim st As new Dotnetspeech.SpObjectToken = “Microsoft Lili - Chinese (China)”
Speaker.Voice = st

Speaker..Speak("中国人", DotNetSpeech.SpeechVoiceSpeakFlags.SVSFlagsAsync)