Sukhoi Su-27 (USSR) ✈ Shenyang J-11 (CHINA)

Sukhoi Su-27 (USSR). First flight: 20 May 1977 (WIKI)

Shenyang J-11 (CHINA). First flight: 1998 (WIKI)

The J-11 was finally born in 1995 as a Chinese version of the Soviet-designed Sukhoi Su-27SK air superiority fighter after China secured a $US2.5 billion production agreement which licensed China to build 200 Su-27SK aircraft using Russian-supplied kits. Under the terms of the agreement, these aircraft would be outfitted with Russian avionics, radars and engines.
— Wikipedia