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Later that year, when Lai was accused of planning to falsely accuse the Wu clan imperial princes and Wu Zetian's daughter Princess Taiping, Princess Taiping and the Wu clan princes reported this to Wu Zetian, and she arrested him, but was not certain whether to execute him, as she believed that he had contributed to her reign. On an occasion when Wu Zetian was touring her garden, Ji was attending to her, and she asked him whether there was anything unusual happening among the people. He pointed out that the people were surprised that, despite the serious crimes that Lai was accused of, Wu Zetian had not put him to death. Wu Zetian, accepting Ji's suggestion that Lai should be put to death, and did so. She also promoted Ji to be an assistant censor. It was said that because Ji was talented and full of strategies, Wu Zetian greatly trusted him as a strategist.