The third episode. In the third episode of the TV series "Hope for the Earth", because the master was burned and unable to work, humble temporary workers volunteered to weld the long-lost Longlin welding. Promised Land is a chronological drama produced by CCTV. The play tells the story of many heroes in the fields of industry, agriculture, commerce, learning and military, represented by the four families of Ma, Wu, Liu and Tian, struggling to move forward in the wave of reform and opening up.