1. Support NR4 FB build material purchase work for retrofit, TEW engine build. Support for engine BOM comparison, purchase component list clear up and procedure follow up work before Aug-2018. 2. Support translation work for technical documents and materials during our discussion with different agencies. From emissions point of view, cause by the frequent communication with government agencies and industry associations about NR4 regulations, we need to translate both English to Chinese and Chinese to English. 3. Support other temperature engineering team work.