1. Press for the first time---------When we press the china Foam pump head for the first time, the china Foam pump head drives the sub-column to compress the spring together through the connected main column; The friction of the cavity wall prompts the piston to open the discharge hole of the sub-column; when the piston slides down, the air in the body is discharged through the opened discharge hole of the sub-column;

2. Press back and forth for many times ------- all the air in the china Foam pump head is exhausted;

3. Liquid suction--------Press the china Foam pump head by hand to discharge the air in the body through the main column, sub-column, piston, and the common compression spring, then release the pressing head, the spring will return back due to the loss of pressure. (up) movement, at this time, the piston also moves downward by rubbing the inner wall of the main body, closing the discharge hole of the sub-column; at this time, the liquid storage cavity in the main body forms a vacuum suction state, sucks the glass ball up, and removes the inside of the bottle. The liquid is sucked into the liquid storage cavity of the body through the suction pipe.

4. Store the liquid——Press the china Foam pump head several times, and store the liquid to the body through several suctions until the liquid is full.

5. Foaming ------- When the liquid in the body's liquid storage chamber is full, press the china Foam pump head again, and the liquid will be sprayed directly from the nozzle through the discharge hole;