Just 40 years ago in China, most of the rich and educated people were killed or sent to the farm. There was no personal property. Everybody worked totally for the state. It was the communistic ideal. With this case we will see how much, if any, things have changed since the cultural revolution and the Viet Nam war against communism.
Everything that was produced was owned by everybody. If you somehow have a business in China, "You didn't build that." It does not belong to you.
Every gproduct that is produced belongs to everybody. Nobody owns anything personally except perhaps for party officials.
Today, things have loosened somewhat, but the question of who can own what is still up to the communists.
The defence, I would guess is the defence of communism and the idea that "You didn't build that." "Someone else always had to prepare the way for new inventions." "There is nothing new under the sun." etc. etc.
In other words there is no such thing as a trade secret. Especially in the software world where everything new was built on something that someone else already built. The defence is that anything of value is owned by everyone that needs it. People and business can not hoard to themselves anything that is of value to the community. This includes so called "propritary software"
This is communist thinking and communist law. Get used to the power of the people in the form of a benevolent central committee.
I suspect Sinovel lawyers will say that AMSC had no right to any trade secrets for the turbine designs that they sold to Sinovel. Furthermore, Sinovel lawyers will say that AMSC needs to be punished for hoarding their software and forcing Sinovel to bribe dejan karabesevic for the good of all Chinese people and communist countries world wide.
It is not just AMSC on trial in the Chinese courts. It is Capitalism that is on trial, only 40 years after all known capitalists in China were disgraced and/or killed.