Escape from Famine: Traveling to the Sui and Tang Dynasties with Oil and Wine

"Oil" is used as the basis for igniting fire and heating, lubricating tools, and exchanging materials; "wine" is used as a medium for disinfecting and healing wounds, keeping out the cold, strengthening courage, and making friends with heroes. A family of three will use these two seemingly ordinary things to find a way out in troubled times.