VVSUM (China) Tablet-PC Operating InstitutionVVSUM is the brand for Tablet-PC of Shenzhen KAIYIDA electronics Co., Ltd.Shenzhen KAIYIDA electronics Co., Ltd. is a high-tech electronics enterprise, specializing at production and research & development for IT digital products. It has a air-conditioner equipped factory with size around 8000 square meter, 8 SMT and assembly lines, and a group of high skilled management staff and technicians.As a well known Tablet-PC manufacturer in China, Shenzhen KAIYIDA electronics Co., Ltd. always try to work out brand new special products to keep level with the fashion. Also we provide OEM?ODM service for domestic and overseas famous brand.