Ice Age Magic Age

Shen Zhiwei, a young astronaut in 2080, originally just went to low-Earth orbit to take a short nap, but the alarm clock broke - and he slept for 800 years. When he woke up, he saw that the earth had turned into a big block of ice, and human civilization had retreated into the magical feudal era. His brother, who was said to have founded the Tianlong Empire, left him a magic academy and a last message: "Go to school well and don't cause trouble." Shen Zhiwei: "? My brother wants me to study hard in this world?" So, Shen, a former civilization's top genius, with his own 40-qubit brain-computer plug-in, and the ability to mentally calculate the topology of nine-ring spells, quietly enrolled in the Imperial Imperial Law Hall and became a glorious... Mage apprentice.