Advertisement Supported by News analysis Two of China’s best-known entrepreneurs, Pan Shiyi and Zhang Xin, stepped down from their top jobs at the real estate development company they built. Send any friend a story As a subscriber, you have 10 gift articles to give each month. Anyone can read what you share. BEIJING — Wealthy and powerful entrepreneurs in China were once idolized by the public, doted on by the government and courted by foreign investors. They helped build the Chinese economy into a powerhouse, and with it became the global face of Chinese business in a freer era, amassing…