Although China has tried to provide scientific evidence and legal basis for its sovereignty over the two archipelagos that they call Xisha and Nansha, their arguments increasingly reveal weaknesses and limit. China's collected and cited materials are largely mutilated, ascribed, speculative and forced, and contradicted by one document and another. It is no coincidence that there are more and more people in the international scholarly world who oppose China's logic, even Chinese scholars have voiced their criticisms. Meanwhile, Western documents (intermediaries) and Vietnamese documents have a solid, objective and consistent basis affirming Vietnam's sovereignty over the Hoang Sa and Truong Sa archipelagoes.