Complex sentence: The party is considered conservative and pro-PRC compared to the pro-democracy forces rose in the late 1980s and early 90s, its mission was claimed to be supporting the implementation of the Sino-British Joint Declaration and maintain Hong Kong's prosperity and stability.
Split into simpler sentences: The party is considered conservative and pro-PRC, in contrast to the pro-democracy forces which rose to prominence in the late 1980s and early 90s. The society's stated mission was to support the implementation of the Sino-British Joint Declaration and maintain Hong Kong's prosperity and stability.