Across decades, the Yin family transformed a $100 immigrant beginning into a McDonald's empire and a $4.4 million footprint in California politics — a story that reads as quintessential American ascent until declassified FBI files placed family patriarch C.C. Yin in the orbit of Fang Fang, a suspected Chinese intelligence operative who cultivated American politicians before vanishing to China in 2015. The case does not resolve into clear guilt or innocence, but it surfaces a deeper question that democracies must now reckon with: how foreign influence, when it works, looks indistinguishable fro