The test
In her previous life, she saw that Li Ting was very interested in chemistry. Li Ting had also mentioned that he was more interested in weapons manufacturing.
However, he had been controlled by a terrorist organization for more than a year. In order to survive, he had done some bad things for them, including weapon manufacturing.
However, he was able to suppress his actions at that time and use weapons that were not very lethal.
Later on, Xing Jiu 'an had used the first version of that weapon. It was made exquisitely, and it was easy to carry around. Moreover, it wasn't very eye - catching.
Although Li's destructive power wasn't particularly great, it was still incomparable to ordinary weapons.
However, Li Ting was already known as a weapon - making genius by that time. If he did not design something that would satisfy those people, he would either be tortured or killed.
Compared to letting go of disobedient people, it was better to kill them.