Katsuji Nakazawa is a Tokyo-based senior staff writer and editorial writer at Nikkei. He spent seven years in China as a correspondent and later as China bureau chief. He was the 2014 recipient of the Vaughn-Ueda International Journalist prize.

Tennis star Peng Shuai's allegations against former Vice Premier Zhang Gaoli are putting President Xi Jinping's "zero tolerance" anti-corruption campaign to the test. (Nikkei montage/AP/Getty Images/Reuters)
Xi caught in dilemma over how to deal with former party heavyweight Zhang Gaoli