BEIJING — Having conquered world markets and challenged American political and military leadership, China has set its sights on becoming a global powerhouse in a different field: scientific research. It now has more laboratory scientists than any other country, outspends the entire European Union on research and development, and produces more scientific articles than any other nation except the United States.

But in its rush to dominance, China has stood out in another, less boastful way. Since 2012, the country has retracted more scientific papers because of faked peer reviews than all other countries and territories put together, according to Retraction Watch, a blog that tracks and seeks to publicize retractions of research papers.

Now, a recent string of high-profile scandals over questionable or discredited research has driven home the point in China that to become a scientific superpower, it must first overcome a festering problem of systemic fraud.

“China wants to become a global leader in science,” said Zhang Lei, a professor of applied physics at Xi’an Jiaotong University. “But how do you achieve that and still preserve the quality of science? We still haven’t figured out how to do that yet.”