One of China's leading feminists has warned US president-elect Donald Trump that fellow feminists around the world are watching his every word and action.

Zheng Churan, who enjoys the support of Hillary Clinton for her women's rights advocacy, penned a letter to Trump spelling out the dangers of chauvinism as he prepares to take office.

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Also known as Datu or Big Rabbit, Zhen wrote to the Republican president-elect, "Even across the Pacific, in the faraway land of China, there are constantly reports of you and your government's involvement in sexual discrimination."

"We wish you to watch out, the feminists worldwide are speaking, and we are watching you," the letter read.

Trump famously courted controversy when he admitted to using his fame and influence to have sex with women. He also said that he gropes them without their consent, saying "When you are a star, they let you do it."

In 2015, Zheng was among five other feminist activists who were detained for more than a month by Chinese authorities after they attempted to hold a peaceful protest against sexual harassment. And now, she is calling on Trump to respect women's rights and not to use his powerful position to spread "straight man cancer."

The term is being increasingly used in China to describe the "disease" exhibited by narrow-minded men seeking to keep women as second rate citizens and work against gender equality.

Straight man cancer also describes men who desperately cling to traditional Chinese norms in relationships such as seeking to oppress women's rights through official government policies, devaluing female labor, and saying that educated women are less attractive.

"'Straight man cancer' is the equivalent of 'male chauvinist Pig' in English," Zhen wrote.

Trump has a hazy record of supporting the persecuted in society. Many advocates in China are worried that his administration will prioritize deal making over human rights.

Tagschina, China human rights, donald trump