J-31’s revolutionary design was special in its integration of design.

CCTV interview with AVIC’s design team of J-31 stealth fighter

AVIC chairman Lin Zuoming and the design team behind the J-31 spoke on the development of the aircraft. 

J-31 was special in its integration of design.
For example, its wings and mid-section of fuselage are one
integrated piece. As a result, in transportation the wings
of the aircraft cannot be dismantled and put into
a container for secrecy.
Picture show aircraft wrapped in cloth on a truck
traveling on an expressway in early July 2012.

Secret in Developing Top Aircrafts with Less Time and Costs

At Zhuhai airshow last month CCTV tried to learn the secret technologies in the J-31 aircraft.
Its reporter interviewed Lin Zhoming, President of Aviation Industry Corporation of China (AVIC)

According to Lin, J-31 ranks the first in the world in its substantial reduction of the number of its parts and components.
Compared with the traditional design, the revolutionary design of the aircraft enables the reduction of 50% in number of parts and components and 54% tools and moulds used, resulting in lots of saving in time and costs.

That is the secret of AVIC’s ability to develop J-31 so quickly and to grab market share from US F-35.

As for the secret of J-31’s revolutionary design, Lin said that J-31 was special in its integration of design. For example, its wings and mid-section of fuselage are one integrated piece. As a result, in transportation the wings of the aircraft cannot be dismantled and put into a container for secrecy.

Hearing that the reporter showed Lin the photo of an aircraft wrapped in cloth on a truck traveling on an expressway in early July 2012. As it took place around the Dragon Boat Festival, the aircraft wrapped in secrecy was referred to as a Dragon Festival dumpling aircraft by Chinese military fans.
 Lin said that it was precisely a J-31 being transferred to a test center. It was tightly wrapped for secrecy.
Source: qianzhan.com “World unique technology in PLA’s J-31 fighter jet: Referred jokingly as dumpling aircraft” summary by Chan Kai Yee)