In April 1951, the People's Liberation Army Navy selected 275 people to study the submarine division of the Soviet Navy's Pacific Fleet at the end of 1954. In June 1954, the first submarine force was formally formed. In April 1951, the People's Liberation Army Navy selected 275 people to study the submarine division of the Soviet Navy's Pacific Fleet at the end of 1954. In the same year, more than 100 university students and high school students were selected from the entire army to study. In April 1953, on the basis of the leadership agency of the Northern Army District and members of the submarine learning team, the submarine base began to be built in Qingdao. On June 19, 1954, the first submarine division was formed in Qingdao, and the unit number was the Nav