In the process of Macao continuing to write the great practice of "one country, two systems" in the new era, it has become a development consensus to enhance the cultural identity and national identity of Macao's youth. In the 2021 policy plan, the Macao SAR government emphasizes the effective promotion of young people to actively participate in the construction of Guangdong, Hong Kong and Macao Bay area and integrate into the overall situation of national development. However, under the background of the new era of high-quality construction in the Guangdong-Hong Kong-Macao Greater Bay Area, how to improve the endogenous motivation of Macao's youth to actively integrate into the overall situation of national development is a focus issue worthy of discussion. Based on the three recommended themes of this competition, such as "telling Chinese stories well", "spreading Chinese culture well" and "I am in charge of my youth", combined with the background of Macao SAR, this work is designed for Macao youth. It is a missionary three-dimensional animation short film around the theme of cultural identity and national identity. It is a powerful attempt to explore and enhance the motivation of Macao youth to participate in national development by using three-dimensional animation technology. As a world cultural heritage of the United Nations, Macao has become a successful example of the great practice of "one country, two systems" in China with its unique charm of cultural diversity between China and the West. This work uses the unique artistic expression form of three-dimensional animation, uses Maya, ZBrush, Substance 3D Painter and other production technology software, based on the parent-child dialogue between father and son in Macao, and uses flashback to present the scenes with historical and cultural characteristics such as Golden Lotus Square in Macao, St. Paul's Battery, St. Joseph's Temple, Egg Tart Shop, Nazha Temple, Lu Lianruo Park and so on, in the process of recalling the past eventful years, we educate young people to join in the great cause of the rejuvenation of the Chinese nation.