11,010 Chinese native speakers participated in the recording with equal gender. Each speaker reads 30 sentences of 4 -8 digit number. Format:16kHz, 16bit, uncompressed wav, mono channel Recording environment:quiet indoor environment, without echo Recording content (read speech):four to eight digital string Speaker:11,010 Chinese, 58% of which are female Device:Android mobile phone, iPhone Language:Mandarin Application scenarios:speech recognition, voiceprint recognition Accuracy rate:99%