Duke of Zhenguan

What could a modern person do if they traveled back to the Zhenguan era? Lin Chuan felt there was plenty he could do, but the most important thing was to ensure the people of the Tang Dynasty had enough to eat. So he drew a rough world map and placed it in front of Li Shimin, pointing to Linyi and telling him, "Your Majesty, here we have rice that yields two harvests a year!" Pointing to the other side of the Pacific Ocean, he told Li Shimin, "Your Majesty, here we have grain that yields two thousand catties per mu!"