What is the relationship between the characters in Luoyang Paper Expensive?

The relationship diagram of people is as follows:

From this picture, we can see that Gao and April are a couple, a pair of sadomasochism, while Bai Lihe is a married love. There is a revenge between Liu Xiang and Bai Li Hongyi for killing their father. Liu Ran and Liu Xiang are uncles, Yuwen Peipei and Liu Xiang are servants, and Liu Ran and Yuwen Peipei are best friends.

April and Becky Li are childhood friends, April and You Wu must be brother and sister, Bailikuanren and You Wu must use each other, and Bailikuanren and Bailihongyi are brothers.

Outline of the story of Luoyang Paper Expensive;

The drama mainly tells the story of Wei Zi Palace and Xuanmen Fengshen Capital under the peony flowers during the Wu Zetian period. Wei Zi Palace in history, that is, Luoyang City and Miyagi in Sui and Tang Dynasties, is the main palace, political center and national symbol of Sui, Tang and Wu Zhou empires. It is located in the northwest corner of Luoyang, the capital of the gods. It was built in the first year of the Sui Dynasty (605), also known as Wei Zi Palace.

It became the ruling place of Sui, Tang, Wu Zhou, Hou Liang, Later Tang, Later Jin and Northern Song Dynasties, and survived for more than 530 years. It is the most used palace in the history of China. The naming concept of Wei Zizhen was later inherited by the Forbidden City in Beijing during the Ming and Qing Dynasties.