C44 Doubt

Lin Sheng could understand Cheng Yunfei's doubts.

"Yunfei, don't worry. I won't lie to you. I will make some samples later and let you try the effect. You will know if what I said is true or not."

"Okay." Cheng Yunfei's heart pounded when she heard Lin Sheng's confidence. She also had some expectations for this matter.

If Lin Sheng could really produce such a product