Chinese tycoons targeted under Xi Jinping

BEIJING, CHINA — China's financial sector was jolted Friday by reports that Bao Fan, the billionaire chairman of investment bank China Renaissance, had gone missing. No official statements were immediately made by authorities to explain his whereabouts, but there was widespread speculation the prominent businessman had fallen afoul of Beijing and was being held for questioning. Several of China's leading financiers have fallen from grace in recent years, as President Xi Jinping carries out an aggressive crackdown on alleged corruption. Here are five of the most high-profile cases: Sun Dawu Agriculture tycoon Sun Dawu was issued an 18-year jail sentence…