Russia says it has been holding a Chinese citizen for the past year on espionage charges.
Russia's Federal Security Service (FSB) said the case of Tong Shengyong was forwarded by prosecutors to the Moscow City Court.
The man is accused of trying to obtain repair manuals for the S-300 long-range surface-to-air missile system, which Beijing had been buying from Moscow for years.
In recent years, Russia banned the sale of the S-300 system to Iran and Syria following international pressure.
Beijing has long been a top buyer of Russian arms, including aircraft and submarines.
It's a rare espionage case between the two countries, which emerged just days before a visit to China by Prime Minister Vladimir Putin.
China has so far issued no comment on the case.
compiled from agency reports