Complex sentence: Chinese Taoist and Japanese Shinto deities were assimilated into Mahayana Buddhism as "Deva" class beings; for example to Chinese Mahayana Buddhists, Indra (synonymous with Śakra) is the Jade Emperor of Taoism.
Split into simpler sentences: Chinese Taoist and Japanese Shinto deities were also assimilated into Mahayana Buddhism as "Deva" class beings. For example, to Chinese Mahayana Buddhists, Indra (synonymous with Śakra) is the Jade Emperor of Taoism.