The marriage between Jiang Yi and Su Ruoxue was a major event. It naturally mustn't be organized sloppily.
After discussing with the group of officials, they decided to hold their wedding four months later. After all, the Great Xia Kingdom had yet to stabilize. After they had reported the decision, Jiang Yi didn't want to do it by then. There was no difference to hold the wedding four months or half a year later. In half a year time, he would have to re-enter the Witch God forbidden ground. This time, he had spent half a month after all the chaos in the Heaven Mystics Kingdom. There were only a little more than five months remaining. He couldn't possibly let Su Ruoxue live alone after they had just got married, right?
After some final discussions, they decided that they would wait for Jiang Yi to exit out from the Witch God forbidden ground and decided for a good date for the wedding one month later.