The seller Alkaid Song is a great person, very friendly and very helpful supplier. She always replied to all my messages on time by alibaba . She also made me a little more discount compared to others. The most important she prepared me the whole list of the required quality documents for customs clearance which was very helpful. I definately will buy again from her. As Medical Doctor , I recommend other customers to buy from this seller. She is very reliable. The machine works well. Thank you