Can the old -fashioned single press the toilet to replace the accessories to achieve water saving (size press)?

The toilet in the picture is a relatively old -fashioned single -press, that is, there is a flushing handle in front, and one punching water. Unlike the current toilet, there are two new New New New New New New New Year.The water is less, suitable for flushing after urination.After the stool, press the large row of water.There is no way to distinguish this old -fashioned toilet, and urination can only cause waste of water.Can this kind of toilet be changed to double -press?Now on the market, there is a kind of water tank accessories that only need to replace this line -controlled water tank accessories (double -pressed) to replace it. On the picture, this is a split toilet, and the water tank accessories of the split toilet must be selected.(Picture from IC Photo)

This picture is a double -press toilet, with two keys on the top of the New New (picture from IC Photo)

So to replace the water valve and pressing of the inner water tank, you can achieve two flushing effects to achieve water -saving effect (picture from IC Photo)