Resection of the left lobe of the liver is largely harmless. Liver surgery usually preserves part of the liver, that is, resection within safe limits. The regenerative function of the liver is very strong, and when only 30% of the volume of a healthy liver is left, the resected liver can grow back to the size of a normal liver in about 6 months without affecting the function of the liver. In the case of combined cirrhosis, the remaining 40% or so of the liver volume is still safe if the liver reserve is functioning well. In normal people, the left half of the liver accounts for about 1/3 of the overall volume of the liver, therefore, left half of the liver resection is generally safe, although there is still a possibility of postoperative bleeding, biliary fistula, abnormal liver function or even failure. Generally, the surgeon will assess the patient’s condition and liver lesions before surgery, predict the remaining liver and its compensatory function, and determine the safe resection range to ensure that the liver maintains its normal function, so that the patient does not need to worry about it.