Niaoniao Yu (余袅袅) is a Chinese NIAONiao Virtual Singer by dsound. She is the default voice library when you download the NIAONiao Editor + Audio Library bundle.
Niaoniao is one of the first NIAONiao banks to be released. She has a Chinese Continous Sound voicebank that is available for download Here. The current version is at 1.5.
Yu Niaoniao will be updated with the engine. Her 2.0 bank can be heard singing here