Their Heavenly Fires summary:

It has been 800 years since Former Dragon Emperor Hua Cheng gave up his godhood for a human lover. Xie Lian, Crown Prince of the Heavenly Phoenix family, is descending to the mortal realm for his first trial. Here he meets a young man who seems eerily familiar and begins to unravel secrets that were never meant to be brought to light. Even against the advice of the heavenly realm he feels himself drawn to this stranger who he feels he knows, as if fate itself connects them. But the red string of fate is so easy to snap, just as it has been in the past…