Ever since he had encountered Li Ping'an moving against the tide at the Buddha's Relics convention in Zhengyang Gate of Chang'an, he had been contemplating making the first move to frame Li Ping'an in front of Cen Changjin, Cen Changqing's brother. However, for safety's sake, he quietly followed Li Ping'an and discovered that Li Ping'an had seemingly no intention of looking for Cen Wenjin, but was merely aimlessly wandering around Chang'an City, moving east and west without any apparent plan. Thus, he held back and did not mention this matter to Cen Wenjin.
That is to say, as of now, Cen Changjin knew his brother had died, but he did not know the specifics of how he had died. Therefore, Wang Lang was afraid that once Li Ping'an met Cen Wenjin's people, Li Ping'an would inevitably speak the truth, provided he wasn't foolish. Therefore, he quickly found an excuse to hide away, shrinking back to quietly observe the changes.