Years ago, the Doom organization had been trying to get the technology from Jing Zhen, but he hid himself in the most populous place, China, and disappeared from the Doom organization's sight.
Back then, the Doom organization sent people to China, captured Shen Ruojing, and tried to force Jing Zhen to submit. However, Jing Zhen did not hand over the technology, and Shen Ruojing was trapped in an underground cave for more than half a year.
However, Song Chen thought that Jing Zhen might be willing to let his daughter suffer, but not his granddaughter.
-
Song Chen's guess was indeed correct.
Now, Jing Zhen was anxiously pacing back and forth, even wishing that he was dead!
If he had disappeared from the world with that technology, perhaps the Doom organization would have stopped pursuing them relentlessly.
Or if he hadn't studied this field when he was young, perhaps he wouldn't be in such a passive situation now!