When performing chest compressions, it is important to pay attention to the magnitude and frequency of compressions. It is important to pay attention to the frequency range of compressions per minute, which should be around 100-120 compressions per minute. For adults, the range of compressions should not be less than 5 cm but not more than 6 cm, and for children or infants, the range of compressions should be at least 1/3 of the anterior-posterior diameter of the chest, i.e., about 5 cm for children and about 4 cm for infants. It is important to note that compressions should not be interrupted at will, except as a last resort. If you interrupt, do not interrupt for more than 10 seconds.