According to Sputnik
11:01 10.03.2016(updated 11:03 10.03.2016)
China will buy Russian Su-35 multi-role fighters equipped with modernized radar control system IRBIS-E, the head of the Russia’s Ryazan State Instrument-Making Enterprise said Thursday.
RYAZAN (Russia), (Sputnik) — Moscow and China agreed on the purchase of 24 Su-35 fighters in 2015.
“Currently, the work on modernizing the IRBIS-E was finished, a contract for the supply of Su-35 aircraft to China was concluded,” Pavel Budagov told RIA Novosti.
IRBIS-E, developed by Russia’s Tikhomirov Scientific Research Institute of Instrument Design, provides detection, tracking and coordination of targets day-and-night, under all weather conditions, as well as in the conditions of natural noise and jamming.