Which is exactly what happened; with the follow-on that any improvements are patented and the patent rights are owned solely by the Chinese:
"In 2008 and 2009, Westinghouse made agreements to work with the Chinese State Nuclear Power Technology Corporation (SNPTC) and other institutes to develop a larger design, the CAP1400 of 1,400 MWe capacity, possibly followed by a 1,700 MWe design. China will own the patent rights for these larger designs. Exporting the new larger units may be possible with Westinghouse's cooperation."