From Radio Free Asia, “Chinese Rights Activist Cao Shunli Dies after Being Denied Medical Care”:

Cao went into detention in ill health, and told her lawyer in October that she was not receiving medical treatment, according to Human Rights in China (HRIC), a Chinese non-governmental organization based in New York and Hong Kong.

"Cao’s lawyer made several requests for medical parole," it said in a statement. "The authorities did not respond to those requests."

For more on Cao Shunli, see: Cao Shunli’s Living Legacy: International and Domestic Responses