B2B（Business to Business）指企業與企業之間通過網絡，進行數據信息交換、傳遞，開展交易和服務活動的商業模式。作為產業互聯網最重要的領域，B2B從1.0發展到4.0，不斷迭代升級。B2B1.0的核心是信息服務，B2B2.0的核心是撮合交易，B2B3.0的核心是融合生態，B2B4.0的核心是智能互信。 本書立足行業分析，以極簡史的寫作風格，回顧B2B從誕生到3.0時代的歷程和特征，闡述區塊鏈、通證經濟、物聯網、AI等新技術在B2B行業的應用現實和前景，展望B2B4.0時代的新全球貿易模式。
The City of Intellectuals—Beg Through the centuries is an illustrated documentary book about Begs local history and traditional cultures.The whole book，with detailed historcal materials and beautiful Pictures，is a chronicle of Begs evolution in the last 500 thousand years，espcially that in the Yuan，mingand Qing dynasties，after which Beg became an international metropolis.For Begs politics，trades and religions in each era.the book emphasizes the cultures，arts.gardens.architures，imperial lives and common peoples traditions.So，this booknot only has an overall and systematic content about Beg，but also has its values in cultures and arts；it gives us both a historical narration and an international angle to represent the historical views of the ancient capital city Beg.
