Ichiban Ushiro no Daimaou - Volume 12, Chapter 4 — A Wonderful World

Knowing she married a wrong guy, what would she do to deal with the subsequent marriage lives?

In order to pay for her brother’s medical expenses, she had to replace her own sister to marry the rich family's elder son . She always thought she was married to the elder one, but she did not know her husband was nominally the younger son He Yi Ning.

He Yi Ning, the real heir of the rich family, the ruthless business emperor, the ruthless workplace tyrant, and her sister’s dreaming husband. When she found out that the person who married her was He Yi Ning, she stunned and asked, “Shouldn’t i be your sister-in-law?” He smiled charmingly: “Are you unhappy with your husband?”

The whole world is subjected to a highly dangerous standardised exam called the Global University Entrance Examination. Answering questions by putting their lives at stake, they would live if they passed the test. Every month the exam will undergo reformation while, occasionally, it is random.

- Description from Novelupdates

The protagonist Yang Yong competes with others in the bar and has a special function of mutation, and he can observe the spectrum emitted by various metals.

Every day in the United States, there are thousands of unowned abandoned warehouses for auction. Yang Yongping borrowed the special function of his left eye to find valuable items from the garbage, such as gold and silver coins, cars, and even antiques, guns, There are all kinds of things.

The scouring has made Yang Yong’s business bigger and bigger, from auctioning old warehouses to auctioning old houses, buying salvage boats to salvage sunken treasures on the seabed, to buying ancient castles in Europe and excavating underground vaults, step by step. Kangzhuang Avenue, proud of life.

- Description from novelbuddy