To meet the demand of the capacity increase of the Optical Transport Network（OTN） system

and to explore a representative technology evolution direction

China Mobile deploys a long-haul beyond 100 G backbone transmission OTN system over G.654 E fiber in the present network environment. By performing a group of cutting-edge new technologies and organizing field tests

we obtain several useful results including the performance improvement in new fiber

practical transmission distance

multiple channel types for coexistence

energy efficiency

function of online measurement

and etc. Evaluations and specific technical recommendations on the key new technologies are also given as a reference for guiding the subsequent deployment.