Su Qingluan had long heard about how terrible menstrual products were in ancient times, but because she had never had her period, she felt that this matter was very far away from her.

In addition to business matters and the many things that require adaptation during the time travel itself, she is always too busy to stop and think about getting some decent sanitary products.

It was not until Liu Yunniang got her period that she felt a greater sense of urgency.

In order to help her friend solve her problem, and to prepare for the future for herself and her sister, Su Qingluan even spent a long time thinking about how to improve the user experience of menstrual products under limited conditions, even though she had never considered Yang - after all, Yang would not tell her daughter about these things.

Finally, through repeated experiments, Su Qingluan made a similar "menstrual belt" based on the "safe pants" she knew about in her previous life that were used to help African refugee girls, which only required the lining to be replaced and the outside to be washed separately.

Since this menstrual belt uses cotton and is sterilized using high-temperature steam, you can imagine how much it costs.

This is destined to be something that cannot be promoted - but in this era where "menstrual shame" is rampant, Su Qingluan is not worried about whether the product can be promoted. It is good enough that she is not arrested as a person with indecent behavior.

So for the sake of her own safety and Zhou Zaoren's safety, she is not going to take the risk for the time being.

What's more, before we find a way to reduce the production cost, this thing is very expensive and can only be used by a few people.

She had given this to Liu Yunniang at the beginning, and Liu Yunniang liked it very much and had a very good experience using it. However, Su Qingluan had never found a suitable opportunity to ask her own mother about it.

...Perhaps, her menstruation this time is a good opportunity?