结构推理 By confirmed, irrevocable, transferable and divisible letter of credit in favor of Beijing Import and Export Co. Ltd payable at sight allowing partial shipments and transshipment.
【正确答案】凭保兑的、不可撤销的、可转让的、可分割的即期付款信用证，信用证以北京进出口有限公司为受益人并允许分批装运和转船。
【答案解析】