The customer is from Sweden and has his own farm, but he has been doing traditional agriculture. Now the price of vegetables is getting more and more expensive. The customer pays attention to hydroponic vegetables, which are fresh and pest-free, so the customer wants to start his own indoor agriculture in his warehouse to increase production. At first, the customer was interested in the hydroponic tower system. We sent the customer videos and parameters related to the tower system. The customer also wanted to learn about the multi-layer hydroponic NFT system. The customer wants to grow lettuce. Both the hydroponic tower system and the hydroponic NFT system can be used to grow lettuce, but the customer prefers the multi-layer NFT system. Therefore, we calculated the output, water consumption, power consumption and price of the multi-layer NFT system for the customer, and the customer needed to communicate with his partner. A week later, the customer decided to buy one set as a sample for testing, and checked the shipping cost for the customer, and then the customer decided to buy it.