IntroductionThe prevalence of corruption is a potential host country is one of the important concerns in the enterprise investigation procedure, since the high prevalence of corruption leads not only to an environment of unfair business competition but also to the instability of society. Corruption is an element of the norms and rules of states and, therefore, affects both the external and internal legitimacy of MNC subsidiaries (Rodriguez, Uhlenbruck & et cal, 2005). Many global organizations such as the World Bank examine the corruption prevalence indicator known as CPI for each country every year. A couple of research studies have also made many findings regarding the prevalence of corruption in the international expansion of companies. However, most literature has quantified the impact of host country corruption on foreign direct investment, which rarely provides an overall view of the impact of corruption prevalence on firm decisions. This paper begins with an overview of the impact of the prevalence of corruption corruption in a potential host country on a company's decision based on three aspects, negative and positive attractiveness and market entry, and also carried out a balanced assessment of the corruption allegations against GlaxoSmithKline in China. As a result, the impact the case could have on the decision of other potential companies to enter the Chinese market was easily summarized. The impact of corruption prevalence on a firm's international expansion decision. Impact on market attractiveness. Corruption is one of the serious obstacles to the environment of fair competition among businesses, which discourages the decision of many companies to expand internationally into some markets of pervasive corruption. However, at the initial stage of the decision-making process, the correct… half of the paper… advantages, competitive advantages and an efficient organization because your brand image is based on the long term. The individual behavior of firms or the joint activities of groups of firms are important elements in the response of firms to corruption. Ultimately, much of the burden falls on governments to curb corrupt tendencies. Businesses are expected to support these efforts (Doh, Rodriguez &t cal, 2003). There are many international organizations that help regulate the company's activities, such as Transparency International and the International Chamber of Commerce. Conclusion To summarize, like the discussion on the impact of the prevalence of corruption in a potential host country, the analysis of the GlaxoSmithKline case and the impact on other potential businesses, potential businesses should carefully organize their business to deal with corruption in foreign markets.