Pregnancy preparation – 99.9% of people think about what women should do, but few people think about what men should do. However, we all know that whether to have a boy or a girl is determined by the man\’s sperm, and at the moment when the sperm meets the egg, you and your wife each have a 50-50 chance of deciding everything about the future baby, such as what the eyes and nose look like. , basically it’s physical fitness, some natural character, etc. Therefore, men should also be prepared before getting pregnant. When using polyvinyl chloride to package food or contain cooking oil and drinking water, each person