Rui Lin Xiu suggested using Dongbao needle. According to the relevant information, Lin Xiu suggested using Dongbao needle, and insulin pen should be injected into the refill with dosage form of 300u/3ml. If the dosage form is 400u/ 10ml, it needs to be extracted with a syringe of 1ml. If the dosage form is specially filled, it is a disposable pre-filled pen.