Datang: What Happened to the King's Fiefdom Becoming 100 Million Points Bigger?

After traveling through time and becoming Li Yuanji, he came to Wude Seven Years Later. Li Yuanji said that he was very panicked. At this time, there were still nearly two years before the Xuanwumen Incident. Thinking about his eldest brother who had been trying to make trouble for him all day long, and his second brother who wanted to kill him, Li Yuanji said that he could no longer stay in Chang'an. At this moment, the system was activated. As long as you developed the place and developed technology, you would be rewarded. The final prize was eternal life. At this moment, Li Yuanji had an idea. Then he invited himself to go to Lingnan, use Lingnan as a fiefdom, and develop Lingnan. After that, everyone fell into deep thought when they saw the fiefdom getting bigger and better. "Why is King Qi's fiefdom larger than that of the Tang Dynasty?"