Complex sentence: When he and his wife returned from Moscow, Soviet Union, many places in China were under the white terror of Kuomintang.They were sent to work in Hunan after returning from Moscow.And in November, 1927, he was sent to work in LiLing together with his wife.
Split into simpler sentences: When he and his wife returned from Moscow, Soviet Union, China were under the white terror of Kuomintang. In such a dangerous situation, they were sent to work in Hunan after returning from Moscow.And in November, 1927, he was sent to work in LiLing together with his wife.