Miss Truth

After returning from South City, Ran Yan began to carefully recall all information about asthma and meticulously recorded it. Meanwhile, Liu Qingsong was primarily responsible for searching for patients with asthma in the streets.

The poison Ran Yan developed, through continuous improvement and perfection, after numerous in-vivo experiments on rats, finally achieved a fairly ideal effect. It minimized the occurrence process and the traces on the corpses to the lowest level, if modern techniques were to be used to examine cell slices, one would definitely find clues, but in the Great Tang, even Ran Yan herself had no better method of verification.

As for the means of poisoning, Ran Yan had also considered many.

Ran Pingyu originally made his fortune as a salt merchant, but after the Court took control of salt sales and prohibited private salt, he then switched to the grain business, and later began to get involved in various industries. Although the Ran Clan wasn’t an imperial merchant, they had many channels to infiltrate and acquire rights to process tribute goods, such as the Ran Clan always being responsible for the initial collection of raw silk in Jiangnan, which wasn’t a very profitable endeavor, but it was helpful to consolidate the Ran’s position in Chang’an.

In other words, if Ran Yan wanted to poison someone, there were many methods she could choose from, as long as it was done without leaving any trace.

But now Xiao Song had already intervened in this matter and instructed her not to be impulsive, so Ran Yan prepared the poison only as a precaution.

Ran Yan sat in the "laboratory," silently packing away the medicine.

"Wife, Shilang is here." Outside, Wan Lu’s voice came.