According to the material 12, what positive role has China played in the governance of border areas?
With the rise of China's national strength, frontier governance plays an increasingly prominent role in the national governance system. Frontier governance not only undertakes the function of guarding the core region of the country in military, economic and cultural aspects, but also undertakes the function of radiating neighboring countries in national governance. The specific functions of frontier governance in national governance are as follows: determining the sustainable development of national economy at the economic level, affecting national sovereignty and security at the political level, affecting the efficiency of national governance at the social level, undertaking the heavy responsibility of building Chinese cultural identity at the cultural level, building beautiful China at the ecological level, and undertaking the specific task of implementing the diplomatic strategy around China at the diplomatic level.