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Use various buildings to compare the treatment characteristics of people with O blood type:

Western-style stone bungalows are strictly guarded against strangers. Open the door to get a clear view of the interior. Even if it gets dirty, it can be washed in time.

Use sparks to compare the love state of people with blood type O: ( blood type and personality http:///xx/)

It is the fire of a kerosene stove. It burns very vigorously and can adjust the direction and grasp it at will. It is courageous to pursue when in love, it is tight-lipped when it is broken, and it is nothing when it is not in love.