I went back to 74 and awakened the Godly Rich System

Du Chuan traveled through time.
Good news: It comes with a super rich system, and the system gives you one million yuan every month.
Bad news: He traveled back to 1974, when supplies were in short supply and the economy was planned. Tickets were needed to buy everything, and there was no way for one million yuan to appear in his hands legally.
…………
"Monopoly system is starting..."
"The launch was successful. One million yuan will be distributed to the host every month. It is reasonable and legal... Reasonable? ... Legal?"
"It was detected that the host wanted to put the funds issued every month into the system's custody."
"The system is restarting..."
"Funds in custody..."
...............
Five years later, reform and opening up were about to begin, and Du Chuan was preparing to embrace his wonderful life as a multi-millionaire.
But when he saw the series of asset catalogs provided by the system, he was stunned.
It seems that I am not only a multi-millionaire, but also a billionaire!
After five years of fund custody, the system seems to have done something remarkable!