From the latest revision of Xu’s article:
To celebrate the partnership, Xu and Lassgard staged a shared dinner on January 18th 2039, amicably enjoying rare cuts of hoho-niku sushi made with Lassgard tuna.
Less than six months later:
On June 22nd 2039, Xu halted construction on the mariculture facilities in Shandong and cancelled Lassgard Bioteknik’s license to use Zōng in its East Asian marketing. This decision was linked to emerging allegations that Lassgard tuna was the cause of an unidentified foodborne illness first reported in January 2039.
And from Lassgard Bioteknik’s article, we know that Lassgard himself was assassinated less than six months after that, on October 29 2039.
Scenario 1: Both Xu and Lassgard were aware of the contamination, and staged the dinner as a photo op without actually eating it. But Xu was a smart man — he wouldn’t have pushed so hard for a Lassgard/Zhupao partnership if he had known about the enormous potential cost of a food-borne disease scandal. (Unless he had the foresight to connect it with the enormous potential profits of colloidal technology…)
Scenario 2: Both Xu and Lassgard were unaware of the contamination, and the dinner went as reported. This seems unlikely given Lassgard’s role as CEO and the fact that his successor “pled guilty to all counts of aggravated negligence and endangerment.”
Scenario 3: Only Lassgard was aware, and let Xu eat while not partaking himself. In the photo of the dinner Xu is clearly holding a piece of tuna, while Lassgard’s maki roll appears to be only rice.
If scenario 3 is the case, when did Xu become aware that Lassgard had effectively murdered him?