On other hand, the winter of this year in Northern China is nastyly cold for many people. Government should expect the shortage of gas before they made such plan.
Looks like there are two type of AVEN design, one is testing on J-10, another was operated by Chairman Jiang.
The first type of AVEN, which is testing on J-10:
From a Journal
The second type of AVEN, which was patented by AVIC Shengyang Liming Aero-engine Group.
Liming's Patent...
AVEN (axial symmetrical vectored nozzle). Basically, all circle vectored nozzles are AVEN.
F-22 take the 2-demension nizzle, which can defelct the aircraft jets to two directions (up and down).
On F-16 VISTA, US tested a special type of AVEN named MATV (multi axis thrust vectoring), which can...
I found an interesting article about china's early research about 2-dimensional nizzle:
Images of Chinese 2-dimensional nizzle model from another article:
Moreover, according to following article, a 2-dimensional nizzle had been tested on a J-8, but I do not find their original source: