The matching requirement for the pared wh-items is not limited to wh-conditionals in Chinese. As new data reveals, pairs of identical wh-items can be found in wh-coordinative sentences, wh-reciprocal sentences as well as wh-repetitive sentences, which differ only in reference from wh-conditionals. Among all the above constructions, while the consequent wh-item in wh-conditionals may be replaced by a semantically equivalent pronoun, it is not allowed in all the others constructions, indicating some Spell-out condition might constrain the syntax which force its semantic interpretations have to occur at LF.