What are the "six family heirlooms"?

During the oil battle in Daqing and the subsequent oil field development and construction, Daqing people carried forward the spirit of patriotism, with the heroic spirit of "if conditions permit, we will go even if conditions are not created", and worked hard despite many difficulties, and gradually formed the spirit of shouldering people, laying a solid foundation, five shovel revolution, repairing factories, recycling teams, and repairing the old and making use of the waste. This is an important part of Daqing's tradition of hard struggle, and it is called "six family heirlooms" by Daqing people.