Hi Hung,
I'm really glad to hear that you and your brother really like the DeKang Desert Ship E-liquid! I believe that your brother can make arrangements with the post office to pick up the package, rather than having it delivered. There isn't a shipping option that accomplishes this, but I'd encourage him to contact his local USPS with this request. He can also have it shipped to his place of business or get a PO box.
Best regards,
Brad