Wang Weidong had to implement this plan, and Xu Zhao and Jiang Chenyan were indeed the best candidates, but they weren't the only options.
If Wang Weidong had noticed other players in Community 15 earlier, he might have chosen them to execute the plan instead.
Ultimately, he chose Xu Zhao and Jiang Chenyan because they stood out earlier in the game.
Since Lin Sizhi is the '↑ Wheel of Fate', who first introduced the 'Numbers Bomb' rule in the game, he naturally attracted attention. Similarly, the '↓ Wheel of Fate' with the same mask could subconsciously be considered a strong player.
Moreover, Xu Zhao, playing the '↓ Wheel of Fate', mentioned some mysterious statements about 'fate', suggesting he and the '↑ Wheel of Fate' were the same person, a clone, or creating the illusion that he could see through fate via secrets from other communities.
