The son is a 24-year-old former student of a technical university in Kyiv, it said, adding that the father, who lives in China, had travelled to Ukraine to coordinate his son’s “espionage activities”.
If convicted, they face up to 15 years in prison on espionage charges.
Kyiv used the anti-ship Neptune missile to destroy the flagship of Russia’s Black Sea Fleet, Moskva, in the early days of the more than three-year war.
In April, Ukraine’s military captured two Chinese nationals and said it had details of dozens more who were fighting for the Russian army.