ym p ics ▁Category : Med al ists ▁at ▁the ▁ 2 0 0 4 ▁Summer ▁Par al ym p ics ▁Category : Year ▁of ▁birth ▁missing ▁( l iving ▁people ) <0x0A> </s> ▁Lu ji ang ▁Pr ison ▁is ▁a ▁prison ▁in ▁Cha oh u ▁City , ▁An hui , ▁China ▁established ▁in ▁ 1 9 5 7 ▁with ▁an ▁area ▁of ▁ 9 8 7 mu . ▁It ▁is ▁a ▁high ▁security ▁prison ▁for ▁serious ▁off enders ▁currently ▁employ ing ▁over ▁ 1 , 6 0 0 . ▁The ▁prison ▁is ▁one ▁of ▁the ▁largest ▁national ▁val ve ▁manufact ures ▁with ▁a ▁ 4 0 - year - old ▁state ▁enter prise ▁that ▁produces ▁standard ▁val ves ▁such ▁as : ▁GB ▁code , ▁English ▁B S , ▁American ▁A NS I , ▁API , ▁A W WA , ▁M SS , ▁German ▁D IN ▁ 4 . 0 , ▁" B ai ▁Hu " ▁brand ▁gate ▁val ve , ▁cut - off , ▁check , ▁ball , ▁val ve , ▁water ▁special ▁purpose ▁val ves ▁as ▁well ▁as ▁micro ▁anti - slow ▁products ▁and ▁filters . ▁There ▁are ▁a ▁total ▁of ▁ 1 0 0 ▁models , ▁ 1 0 0 0 ▁specific ations ▁and ▁val ves ▁sizes ▁of ▁ 1 5 - 1 6 0 0 mm ▁produced ▁here . ▁Past ▁projects ▁have ▁included ▁the ▁Chair man ▁Ma o ▁Memorial ▁Hall ▁and ▁Q in sh an ▁N uc lear ▁Power ▁Plant . ▁In ▁ 1 9 9 7 ▁it ▁received