In response to the invitation, Prince Heng's advisors were suspicious. Apparently they felt that the massacre of the Lü clan was unjustified, and were concerned that the officials in fact had intended on making Prince Heng a puppet and were ready to take real power themselves. However, one of Prince Heng's advisors, Song Chang (宋昌), had a different opinion. He believed that the people were supportive of the Han dynasty and would not tolerate a takeover; and that given that there were many other principalities outside the capital, that the officials, even if they had wanted to, would be unable to usurp imperial power. Still uncertain, Prince Heng sent his uncle Bo Zhao (薄昭) to Xi'an to meet with Zhou, who guaranteed that the officials were sincere in their invitation and had no ulterior motive. Bo believed them and urged Prince Heng to accept the offer.