Yinsheng Digifavor Co Ltd, formerly NNK Group Ltd, is a China-based investment holding company principally engaged in the provision of mobile top-up services. The Company provides mobile top-up services to mobile users through 007ka top-up platform. The Company also provides mobile top-up services through offline channels, including convenience stores, mobile phone stores and other third party retailer chains, as well as third party online platforms, the Company’s Websites and WeChat public account. The Company's services cover nation-wide networks operated by the Chinese telecommunication operators. The Company also provides digital marketing services, including multi-category digital product procurement resources, multi-scenario digital marketing mix solutions and multi-channel user promotion. The Company mainly operates businesses in the domestic market.