Complex sentence: In his nineties Tsien helped with the revision and proofreading for the 2nd edition of his Written on Bamboo and Silk, which appeared in 2004 and arranged for it to be translated into Chinese.
Split into simpler sentences: In his nineties he helped with the revision and proofreading for the 2nd edition of his Written on Bamboo and Silk, which appeared in 2004. Tsien arranged for it to be translated into Chinese.