This paper discusses rise and fall of the Ret-Ser Engineering Agency basketball team established by Xiao-zhang Yan who served as the director of Ret-Ser Engineering Agency since 1959 to 1986. Sponsored by Ret-Ser Engineering Agency, this basketball team rose soundly in a special circumstance that ROC encountered unfavorable situation internationally. It had played a significant role for the Government who employed sport as an alternative access to develop foreign relations. Hence, this basketball team played many games in the foreign countries with formal diplomacy with ROC. Its marvelous winning records earned considerable applause from the officials and the public in the foreign nations that consolidated their friendship with Taiwan. In this light, this team, with wonderful performances abroad, promoted the confidence of Taiwanese for the Government to get through the tough period in the 1960s and 1970s. The history of this basketball shows firm evidence that sport not only was beneficial for diplomacy, but also had the power to make the people as a whole.