When Yang Xuangan rose, Li first advised him to seize Guanzhong [(i.e., the Chang'an region)], but when he himself became leader, he could not beat his drums and head west, and that led to his defeat.
Yang Xuangan was advised by Li to seize Guanzhong [(i.e., Chang'an region)] when he ascended. However, after becoming the leader himself, he lacked the determination to lead an expedition westward, which led to his defeat.