Great Tang: From the Start, I Turned Water to Ice

Shen Feng transmigrates to Chang'an in the Tang dynasty, in the first year of the Zhenguan era.

He activates a sign-in System that grants him one draw every seven days.

His first sign-in reward is saltpeter, which he uses to make ice. It becomes a sensation in Chang'an, and he makes a fortune.

His second sign-in reward is a collection of famous poems. By accident, he earns a reputation on par with the great scholars.

His third sign-in reward is a telescope, which lets Li Shimin learn that Earth is just one sphere in the universe.

The sign-in rewards keep coming, from fine steel to firearms.

Then one day, the protagonist draws a ship with a displacement of ten thousand tons.