This book is divided into two parts: the first part is a special review of the international situation in 2020, including three chapters of big powers and diplomacy, main regional situation and international and regional issues, a total of 16 articles; the second part is about the 2020 Commentary on Chinas diplomacy, including three chapters of Chinas Diplomatic Layout, Relations between China and Countries and Regions and Domain Diplomacy, with a total of 19 articles. This book believes that 2020 is a very special year in human history. The sudden new crown pneumonia epidemic has hit countries all over the world. The major changes unseen in a century are intertwined with the rare major epidemic in the century. The international situation and international pattern have further evolved in depth. Under the strong leadership of the Party Central Committee with Comrade Xi Jinping at its core, the Chinese people have united as one to take the lead in controlling the epidemic, led by the diplomacy of the head of state, and focused on uniting to fight the epidemic to safeguard national interests and maintain global stability.