Complex sentence: The Soviets massively intensified their broadcasts inciting Uyghurs to revolt against the Chinese via Radio Tashkent since 1967 and directly harbored and supported separatist guerilla fighters to attack the Chinese border, in 1966 the amount of Soviet sponsored separatist attacks on China numbered 5,000.
Split into simpler sentences: The Soviets massively intensified their broadcasts, inciting Uyghurs to revolt against the Chinese via Radio Tashkent since 1967 and directly harbored and supported separatist guerilla fighters to attack the Chinese border. In 1966 the amount of Soviet sponsored separatist attacks on China numbered 5,000.