The EHA mkulu-chotchinga BOPA filimu yopangidwa ndi Changsu ali kwambiri chapadera fungo posungira ndi mpweya chotchinga katundu [EHAp ＜2cc/㎡·day·atm (23℃ 50% RH)], amene angathe kuchepetsa chiopsezo cha tizilombo toyambitsa matenda kuipitsidwa ndipo akhoza kusungidwa. kwa nthawi yayitali.Kusunga choyambirira kukoma ndi mwatsopano kukoma kwa tchizi.Kuphatikiza apo, EHA imatha kukhalabe yolimba komanso yopumira pakuzizira kozizira, zomwe zimatha kuchepetsa chiwopsezo cha kusweka kwa thumba chifukwa cha zovuta pamayendedwe azinthu.