The resignation of OpenAI's founder as CEO has ignited an internal power struggle. AI entrepreneurs in both China and the U.S. are under pressure to become profitable, with significant differences in the investment markets. The era of large models presents new challenges for entrepreneurs, as the survival space for independent apps shrinks. Investors are focusing on different segments: application layers are gaining attention in China, while the investment market in the U.S. is booming. The differences in AI entrepreneurship between China and the U.S. stem from the maturity of large models and the activity level of the investment markets.