Zhang Wei-Lan had invested in his son this heavily because he desired to pass the Imperial Lineage under his command so he could leave Earth and explore the infinite possibilities to be the first Daywalker on Earth to reach the Eternal Rank.
He knew it was near impossible to achieve it while staying on Earth and managing a region, an agency, a family... and so much more.
Just when he started having faith that his hard work and legacy were left in the right hands, his son goes and gets his ass handed to him in the most humiliating fashion possible.
He wouldn't have minded if he lost after putting in a bitter, honorable fight to the end... instead, Yanhuan's videos were circulating all over the network, acting all cocky and brazen while he was already put in an illusion.
Zhang Wei-Lan understood that if his son were careful and had his guard raised to the limit, he would have discovered the illusion much earlier and saved himself the embarrassment.
