The digital economy has become a core area of strategic competition between the United States and China. In recent years, the United States has continuously intensified its strategic deployment in digital competition with China, escalating related competitive tactics and leveraging its influence to exert pressure on third countries and regions, attempting to comprehensively contain Chinese companies globally and thereby weaken their competitiveness in the international market. However, even under such immense external pressure, Chinese companies have consistently gained widespread recognition in overseas markets due to their inherent strengths and unique characteristics. This resilience of Chinese companies is largely due to their ability to engage in disruptive innovation. This article systematically reviews the theory of disruptive innovation. Two representative companies, Huawei and Alibaba, are selected as case studies for in-depth research. This article traces the growth journeys of these two companies from marginalized small enterprises to global technology leaders, analyzing the strategies and driving factors that shaped their disruptive innovation capabilities during this development process. This paper further discusses how Huawei and Alibaba leveraged the unique advantages of disruptive innovation to effectively resist Western isolation and containment in Southeast Asia, earning the trust and support of local markets and securing market positions in smart cities and 5G communications, respectively, that are difficult for Western companies to replace. This paper hopes to provide valuable theoretical guidance and practical insights, helping Chinese companies achieve steady growth amidst increasingly severe suppression and containment, and a complex and volatile international competitive environment.