Yuecheng (King) a male VOCALOID & Zhang Chuchu a female VOCALOID, are both being developed for the VOCALOID4 engine by Shanghai Wangcheng Information Technology.
Shanghai Wangcheng Information Technology is the agency that helped sell Xin Hua to Mainland China. Now they want to make VOCALOIDs via business-to-business method (collaborating with other business to turn existing characters to VOCALOID). Currently they are working with Migu Comics for Zhang Chuchu, and NetEase Comics for Yuecheng to make them into VOCALOIDs.
In late 2016, an audition to become ChuChu’s voice provider was launched and consecutively another audition was held to find King's voice provider from March 14 to March 24 along with instructions on how to participate. They do have test demos out now on BiliBili.
For Yuecheng's audition, in first place was 217-Jinli (217-锦鲤; :217-Jǐnlǐ), second place was Feilünuochen (飞吕诺辰; Fēilǚnuòchén)