Complex sentence: In addition to his correspondence work, he wrote several works that were published in Europe: about the Ailanthus Silkmoth, Chinese varnishing and fireworks, an a French-Chinese dictionary.
Split into simpler sentences: In addition to his correspondence work, he wrote several works that were published in Europe. These covered topics such as the Ailanthus Silkmoth, Chinese varnishing and fireworks, as well as a French-Chinese dictionary.