Cuestionario estrella, First Survey Network, Hengzhi Network Survey, Yitiao.com, Jisi.com, Gehlot Market Research Co., Ltd., Digital 100 Market Research Company, Yingdezhi Network Survey, Insightcn (51POINT), Sand Survey, Xinqin Survey, AC Nielsen, mySurveyASIA, WoWuSurvey.com, etc.