The Great and Beautiful Act is essentially a political gamble: at the expense of expanding the fiscal deficit, it seeks to exchange for short-term economic growth and the solidification of Trump's policy legacy. Its core contradiction lies in attempting to strengthen central functions (national defense, borders) while reducing the tax base without reforming the federal decentralization structure, ultimately leading to soaring debt and social division. For the global community, the act accelerates the 'de-China' of supply chains, the retreat of green transformation, and the confrontation of technological camps. China needs to be wary of short-term trade shocks while seizing the strategic window for independent innovation and diversified market layout.