Saving energy: The regional aircraft Modem Ark (MA)600 in Xi'an, China, on Sunday. XI'AN: The first China-made regional aircraft Modem Ark (MA)600 was completed on Sunday, marking a milestone in the nation's drive to be one of the world's leading providers of turboprop regional aircraft. The research and development of the 70-seat MA700 was also under way, head of the preparation group for the China Aviation Industry Group Corporation Lin Zuomin announced at the Xi'an Aircraft Industry(Group) Company Ltd.