According to the naval operation plan, the operational essentials of the first stage are as follows: (1) At the beginning of the operation, 1 air fleet (with six aircraft carriers as the main force) attacked the main fleet of the US military moored at Pearl Harbor; (2) At the same time, 1 1 air fleet (shore-based aviation) cooperated with the army to carry out sudden attacks on the Philippines and the Malay Peninsula, and then carried out air combat missions in this theater; (3) The 2nd Fleet carries out combat missions in Philippine waters, in order to seize the sea power in East Asia and ensure the safety of maritime transport troops; (4) The 3rd Fleet escorted the fleet that transported troops to the Philippines and the south to cover their landing operations; The southern fleet cooperated with the troops landing on the Malay Peninsula; (5) The 2nd Fleet participated in the invasion of Hongkong, and the 4th Fleet participated in the invasion of Guam, wake island and rabaul; (6) The 6th Fleet (submarine force) participated in the sneak attack on Pearl Harbor, and then continued to attack enemy ships, weakening the enemy's maritime power; (7) In the first stage of operations, if the main US fleet comes to attack, the main joint fleet except the Third Fleet and the South Dispatch Fleet will join forces with it and annihilate it.