the enclosed informatiaon peitains to you in immigrating to the USA ,the information concerning your registra is noted at the end of the letter  

unfortunately ,visa numbers are  not presently available for use ,you will be notified when further consideration can  e given processing yourapplication for immigration , the  reason for the delay is that there are more applicanta for visas than there are immigrangt visa numbers availabie under the limitation prescribed by law ,for some visa categories ,for example F3 or F4,
this delay could be many years,should you wish to know whish priority dates are currently being processed, you may call the State  Departments Visa Office at（202）663－1541。
you are cautioned that you MUST NOT make any firm plans,such as disposing of property ,giving up jobs,or making travel arrangements at this time ,we have no way of predicting when it will be possible  to proceed with your immigrant  visa  application  

you need  not check with us further unless you need to report a chang of address or change  in your personal situation which may affect your entitlement to an we will keep your case on file until further action is possible . when communicating with this office ,either by telephong  or letter ,you must ALWAYS refer to your name and case number exactly as they appear below.