Substitute for the Princess: She Is the Prince's White Moonlight

The cold-faced war god prince Xiao Jue (word: Qing Cang) sadly lost Bai Yueguang's "Miss Yunsheng" (actually the heroine Shen Weixi), and married a concubine Shen Weixi (actually herself) who was 70% similar to her as a substitute. The heroine lost her memory due to family persecution and her appearance was slightly modified (such as using special drugs or slight disguise, leaving reversible clues). The male protagonist doesn't know that he is his sweetheart