My System Is Connected to Datang

Tang Tian traveled through the parallel world, obtained the golden finger, and traveled between reality and the Tang Dynasty! "Come and take a look, the luminous iron cylinder is a must-have for home life! The one with the highest price will get it!" "Italian cannons and aircraft carriers are for sale at low prices! The first choice for war and the artifact of nation-building!" Li Shimin: "Why is this food so delicious? Hurry and serve more!" Princess Changle: "Brother Tian, the jewelry you carve is so exquisite and talented. I like you so much!" Tang Tian silently took back the carving machine. Cheng Yaojin: "You are Tang Tian, right? Come and compete with me!" Tang Tian held the anesthetic gun: "Bang!" Level 1 system: You can stay in ancient times for 1 hour! Upgrade the system to level 2: you can stay in ancient times for 2 hours + become proficient in firearms production! System upgrade to level 24: permanent stay + various high-tech mastery! This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.