The lab is relocating, how can I not damage the samples stored in the ultra-low temperature refrigerator, please solve!

The owner is a researcher, right, which is indeed difficult to deal with, a carelessness may damage the valuables inside. I work in Shanghai Ruijin Hospital, in February this year, our hospital to 75 ultra-low-temperature refrigerators to move, but fortunately bought the Haier ultra-low-temperature refrigerators, they sent a special "Run Xin" service team to help us move smoothly. Haier Biomedical not only attentive service, and cryogenic refrigeration technology is strong, Haier Biomedical ultra-low-temperature refrigerator carbon dioxide refrigeration backup system to solve the ultra-low-temperature refrigerator power outages, system failure does not operate the problem to ensure that the biological samples inside there is no damage, we are very grateful.