Complex sentence: Martial law was lifted in 1987; and the Temporary Provisions were repealed and the Constitution was amended in 1991 to reflect the government's loss of mainland China in 1991, and the Constitution finally formed the basis of a multi-party democracy.
Split into simpler sentences: Martial law was lifted in 1987 and the Temporary Provisions were repealed. The Constitution was amended in 1991 to reflect the government's loss of mainland China in 1991, and the Constitution finally formed the basis of a multi-party democracy.