Today's world is a world where four forms coexist and alternate: the agricultural age, the industrial age, the Internet age, and the artificial intelligence age. Every time human productivity advances, cross-era business opportunities will emerge. The pace of human development will not stop and is irreversible. Only by accurately positioning ourselves and knowing which era we are in and which era we are about to enter can we seize historic opportunities. China is about to enter the artificial intelligence era, while some countries are still in the early stages of the industrial age and the early stages of the Internet age. The distance between the ages is a historic opportunity.