Complex sentence: In 2010 Chang'an was supposed to merge its Suzuki joint venture with that of Changhe, another automaker that participates in a JV with the Japanese company, but this plan, supported by Suzuki, did not see fruition.
Split into simpler sentences: In 2010 Chang'an was supposed to merge its Suzuki joint venture with that of Changhe, another automaker that participates in a JV with this Japanese company. But this plan, supported by Suzuki, did not see fruition.