The Chinese military has finished testing its new S-400 air defense systems procured from Russia, reports Russia's Tass news agency.
The second and final test-firing of the system occurred in late December, a diplomatic source said on Thursday.
During the test, the system launched a long-range 48N6E missile and hit a target at a range of 155 miles (250 km).
Another trial was held earlier in the month against a simulated ballistic target.
China is the first international...