In the era of global digital transformation, digital diplomacy has become a crucial strategic tool that helps nations execute modern foreign policy, promote their national image, solidify their international standing, and increase their global influence. Driven by its strategies to become a cyber superpower and an intellectual infrastructure powerhouse, China has flexibly deployed diverse forms of digital diplomacy across numerous domestic and international platforms. This paper elucidates China’s strategic upgrade in digital foreign policy thinking and its deployment of a multi-layered digital diplomacy model that integrates hard infrastructure, soft norms, and agenda-setting media. Based on this practical analysis, the paper draws key lessons and proposes strategic policy solutions for Vietnam.