▁and ▁the ▁X ian F eng ▁miss ile - inter cept ing ▁can non . ▁The ▁F J - 1 ▁had ▁completed ▁two ▁successful ▁flight ▁tests ▁during ▁ 1 9 7 9 , ▁while ▁the ▁low - alt itude ▁inter ceptor ▁F J - 2 ▁completed ▁some ▁successful ▁flight ▁tests ▁using ▁scale d ▁pro tot ypes . ▁A ▁high ▁alt itude ▁F J - 3 ▁inter ceptor ▁was ▁also ▁proposed . ▁Despite ▁the ▁development ▁of ▁miss iles , ▁the ▁programme ▁was ▁slow ed ▁down ▁due ▁to ▁financial ▁and ▁political ▁reasons . ▁It ▁was ▁finally ▁closed ▁down ▁during ▁ 1 9 8 0 ▁under ▁a ▁new ▁leadership ▁of ▁D eng ▁X ia op ing ▁as ▁it ▁was ▁seem ingly ▁de emed ▁unnecessary ▁after ▁the ▁ 1 9 7 2 ▁Anti - B all istic ▁Miss ile ▁Tre aty ▁between ▁the ▁Soviet ▁Union ▁and ▁the ▁United ▁States ▁and ▁the ▁closure ▁of ▁the ▁US ▁Saf egu ard ▁AB M ▁system . ▁ ▁Oper ational ▁Chinese ▁system ▁ ▁In ▁March ▁ 2 0 0 6 , ▁China ▁tested ▁an ▁inter ceptor ▁system ▁compar able ▁to ▁the ▁U . S . ▁Patri ot ▁miss iles . ▁ ▁China ▁has ▁acquired ▁and ▁is ▁license - produ cing ▁the ▁S - 3 0 0 PM U - 2 / S - 3 0 0 PM U - 1 ▁series ▁of ▁terminal ▁AB M - cap able ▁S AM s . ▁China - produ ced ▁H Q - 9 ▁S AM ▁system ▁may ▁possess ▁terminal ▁AB M ▁capabilities . ▁P RC