Reliable

It is true that when you buy equipment, you get a formula as a gift. You buy the equipment just to produce laundry detergent. If you are not given a formula, you only have the equipment to produce the product. So the recipe became incidental to selling the equipment.

As for the Jiucai trademark, according to a search with the China Trademark Office, this trademark is a successfully registered trademark, and it also belongs to the laundry detergent category and can be used for laundry detergent and other products.

As long as you obtain the authorization from the trademark owner, you can legally use this trademark. If you use it without authorization, it will be a trademark infringement and you will need to bear legal responsibility.