BEIJING — Leaders of China's elite state industries are renowned for their power, influence, and – in several recent cases – corruption. Increasingly, they are paying the price. On Friday, the former head of the company that runs airports in Beijing and more than 30 other Chinese cities was put to death after the People's Supreme Court upheld his sentence in a $16 million bribery and embezzlement case. Li Peiying's execution came two days after word emerged that the head of China's nuclear power program was under investigation for alleged corruption.