Time Travel: Zhang Guifei's Counterattack

Modern Zhang Ziwei travels back to Zhang Ziwei, the noble concubine of Zhao Zhen in the Song Dynasty. It turns out that Zhang Ziwei doesn't want the chance to be reborn, so he lets modern Zhang Ziwei live for her. Zhang Ziwei, who has a system, wants to protect the original owner's poor three princesses, plus a prince. The harem is full of conspiracies and intrigues. Can she survive them one by one?