回複：請教各位,H-1B RENEWAL 加急, 寄出了4個星期,CHECK未被CASHED.也沒有EMAIL,請給建議.

See if you sent to wrong processing center. In addition, the form you used might be expired, then no processing center will work on the case until you correct it. It happened to my H1B amendment case earlier this year. Expect to have a return letter to you. If not above situation, I don't know