The Shadown of the Dragon by Marc Cameron

This was written by Mark It is about the Campus team an off-the-books counter-intelligence team set up by Jack Ryan so that it would not be held back by too many bureaucratic encumbrances in fulfilling its mission. 

The Chinese Navy had designed a submarine propulsion system known as the Mirage that allowed it to run silent submerged but unfortunately it is severely damaged in after entering the North Pole area after clearing the Bering Straits. 

It was China's efforts to create a true blue water navy capabilities. The inventor, Profession Liu, who was on board for the maiden voyage was stricken with stroke after a catastrophic accident that decimated the engineering crew. It turned out that the Chinese did not have a backup plan to build another propulsion system should Professor Liu become incapacitated. However, it turned out that an Uyghur (oy guh) woman, a gifted Mathematician, was the original inventor. To complicate matters, she was stripped of her position at the university and became part of the Uyghur uprising. The Campus came into the picture to extricate her from China while also doing so for her daughter.