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Saving is our virtue, we should treasure every bit of resource in our daily lives,such as saving pigment.When we 're running out of the pigment,there will be still some pigment left in the tube.I make a V-shape opening in the bottom of the tube,and writings marked beside it to tell users to tear the tube.Thus we can easily use the rest of pigment in the tube.It will make a mickle if everyone saves a little.
Dalian Minzu University
Dalian Nationalities University