The judicial efficiency of cross-Straits courts should be further improved under legal cooperation of the mainland and Taiwan, officials of the Supreme People's Court said on Thursday.

The cross-Straits courts signed the agreement on mutual judicial assistance in 2009, aiming to improve investigations, delivery of legal documents, approval of verdicts and transfer of compensation, according to a statement from the top court.

By May, 37,423 cases had been handled under the agreement, and the number is rising rapidly, said Sun Jungong, the top court's spokesman.