Russia and China trying to make stealth obsolete - Business Insider: The US and its allies continue to invest heavily in the F-35 and other stealth-capable aircraft. But Russia and China are rapidly developing systems that would negate the benefits that stealth offers.
According to Zarchary Keck writing in The National Interest, both Beijing and Moscow have begun development of unmanned aerial vehicles that have the goal of finding, detecting, and possibly even eliminating enemy stealth aircraft.
China's stealth detection drone, called the Divine Eagle, is believed to be specially built to counter stealth aircraft while they are still far from the Chinese mainland.