China's most competitive companies are winning global market share through innovation in electric vehicles and battery technology, yet they face a hidden threat from within. While US tariffs and EU policies grab headlines, the real danger comes from inefficient domestic rivals propped up by local governments. This internal drag on productivity could undermine China's global champions more than any external pressure.

A decade ago, China's corporate landscape was dominated by state-owned enterprises focused on political connections rather than profitability. That has changed dramatically. BYD now outsells Tesla in electric vehicles, CATL supplies batteries across Europe and North America, and Huawei advances in semiconductors despite sanctions. These private, technology-driven companies represent China's "good cholesterol" – forged in brutally competitive domestic markets.

Western policymakers cannot afford to lower defenses against Chinese companies that intend to expand their international market share. However, the biggest obstacle to Chinese corporate success is not Trump's tariffs or Iran's oil crisis; it is the bad cholesterol at home. Local governments keep unproductive companies alive through subsidies and credit extensions, draining pricing power and profitability from China's most innovative firms. This paradox – where global champions are undermined by domestic inefficiency – poses the most significant long-term challenge to China's economic ambitions.