Starting with a Portal I Can Easily Dominate the Otherworld

Tang Xian transmigrated to Earth ten years ago, only to suddenly be bound to a teleportation system. He handed it over and, along with modern gadgets like tanks and cannons, went to a fantasy world. There, the mountains were lush, the waters clear, the birds sang, gold mines and oil were plentiful, and the inhabitants were incredibly wealthy. Under Earth's influence of goods and cannons, their economy was exploited. Cultivator 1: "Holy crap, this isn't a syringe! It can inject spiritual energy directly into the bloodline! It's clearly a divine artifact!" Cultivator 2: "Holy crap, this instant noodles are so delicious! They're even better than spirit beast meat!" Sect Elder: "Sect Leader, a wicked disciple has offended those Dragon Kingdom people. Their firewood sticks can instantly kill cultivators from a distance. We are utterly powerless!" Sect Leader: "What's that thing flying over there with a long tail?" The sect collapses!