It comes after a decision by Buenos Aires to abandon talks with Vladimir Putin to secure 12 Sukhoi Su-24 'Fencer" bombers.
Last night sources told the Sunday Express that the deal with Russia, revealed by the Sunday Express in September, had stalled after a series of delays and concerns over post-sale maintenance.
However, that failure will see Argentina now take delivery of 20 of the Chinese-made fighter jets.
In a "working group" formed by the two countries, Beijing agreed to supply around 20 FC-1 fighter jets produced by the Chengdu Aircraft Corporation.
The CAC FC-1 Xiaolong (Fierce Dragon), or PAC JF-17 Thunder, is a light-weight, single-engine, multi-role combat aircraft developed jointly by the Pakistan Air Force, the Pakistan Aeronautical Complex (PAC) and the Chengdu Aircraft Industries Corporation (CAC) of China. Its designation "JF-17 Thunder" by Pakistan is short for "Joint Fighter-17", while the designation "FC-1 Xiaolong" by China means "Fighter China-1 Fierce Dragon".
The FC-1 can be armed with up to 3,629 kg (8,000 lb) of air-to-air and air-to-ground weaponry, as well as other equipment, mounted externally on the aircraft's seven hardpoints. The under-fuselage and inboard under-wing hardpoints are plumbed, enabling them to carry droptanks of various sizes for extra fuel. The single-seat, single-engine, fighter has a top speed of Mach 1.8 at altitude of 55,000 ft and combat range of 840 miles, allowing it to comfortably fly to Port Stanley and back from the Tierra del Fuego air base in southern Argentina.