AbstractULTRA (Universal Language Translator) is a multi-lingua] bidirectional translation system between English, Spanish, German, Japanese and Chinese. It employs an interlingua] structure to translate among these five languages. An interlingual representation is used as a deep structure through which any pair of these languages can be translated in either direction. This paper describes some techniques used in the Chinese system to solve problems in word ordering, language equivalency, Chinese verb constituent and prepositional phrase attachment. By means of these techniques translation quality has been significantly improved. Heuristic search, which results in translation efficiency, is also discussed.