In 2023, the cute four-year-old Su Guoguo accidentally bound to the "National Treasure" live broadcast system and traveled to the Marco Polo Bridge front line in 1937. When a young child's voice sounded in the smoke: "Uncles, the country has sent me to bring warmth!" - The whole China was shocked. Compressed biscuits are parachuted into the trenches, first aid kits are accurately delivered, and future drawings go directly to the arsenal. In the live broadcast room, tens of millions of netizens transformed into "Yun Parents" and rewarded people with gifts across time and space. Little Guoguo tilted her head and asked, "Dad said the bad guys want to be spanked. Can I use a toy water gun to feed them?" At that moment, gentle ripples appeared in the long river of history. When the "Future Express" was delivered one after another, the ancestors who fought bloody battles saluted with red eyes: "We have really waited for this prosperous age!"