Anti-Japanese War Frenzy: World Hegemon, Riches and Brothers

Traveling back to the War of Resistance against Japan, Li Feng carries two systems with him.
(System 1) Rich Man System: LV1 One dollar per minute.
LV2, two dollars per minute.
LV3, four dollars per minute.
LV4, eight dollars per minute.
The higher the level, the more the ocean will double.
It comes with a built-in store where you can buy almost anything.
Li Feng: "Don't use your country's wealth to challenge my pocket money."
(System 2) Brother System: 100 brothers are refreshed every day, 1000 in ten days...
If you're a true brother, come and help!
When Li Feng has a thousand brothers, he will form an infantry regiment!
When Li Feng has ten thousand brothers, he will establish a German-equipped division!
When Li Feng has 100,000 brothers, he will establish an armored army group!
When Li Feng has a million brothers, he will have a complete army, navy, and air force!
Smash the Japanese devils and beat the foreign powers.
To become the world's dominant power.
Li Feng: "Lots of money..."