Thx for your reply, but I think

来源: 于 2006-08-01 10:39:35 [旧帖] [给我悄悄话] 本文已被阅读：次

you misunderstand my question, I mean transfering the PD of RIR to EB1B, not transfering I-485 to RIR.

Just send them a letter saying this, no need to transfer I-485 to RIR. Don't know whether I can do this.