With the permanent closure of the Søderberg lines in 2004, Yunnan became an exclusively prebake operation. The Runxin and Yongxing smelters are included in the Yunnan costing from 2007. Wood Mackenzie’s asset reports are built from the bottom up, incorporating a number of granular data metrics to ultimately produce our industry standard cash operating costs. This report contains a detailed asset note giving you a holistic view of the asset, including an operational overview through to a timeline of events from inception to now. This qualitative analysis is supplemented by the associated Excel download which enables interrogation of a whole series of cost and production metrics over the life of the asset.