She won't back down until she battles down and wins the war.
Once Li Xue agreed to take the process of coronation, the arrangements in the royal palace started in full swing as if all this while they were all just waiting for a green flag from the princess. This alone was enough to reveal the value Li Xue held in the royal family. The members who were in doubt of it got to understand it once all the processes started.
Even after the announcement of Li Xue being the next royal heir, there were small groups waiting for the revocation of the decision. It was not their fault to think like that but the fault was in their orthodox perception that was simply not allowing them to think a woman ruling the country. So, they were believing that the royal couple would revoke their plans of making Li Xue the crown princess.