Starting Technology Tree: the Stars Chewed up Civilization

Xiao Tian returned from the bloody apocalypse, and when he opened his eyes, it was the eve of an interstellar war. An alien probe named 'Yam' is tearing apart Jupiter, and its tongue is licking towards the earth. Despair enveloped the world, and the silent 'civilization technology tree system' in Xiao Tian's body suddenly activated. The first option unlocked was actually the 'Star Project' that only existed in old papers! The aerospace aircraft carrier Luanniao is just the starting point, Xuannv fighter planes, Chengying mechas... He will use the limits of human imagination to build the Great Steel Wall that guards the mother planet. When the chewing sounds deep in the stars finally approached, what they faced was no longer a lamb to be slaughtered, but a civilization that was completely ignited and armed to the teeth!