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Jindi South Jambi B Co. Limited (JSJB) as the new operator for South Jambi B Block in Jambi, Indonesia intends to reproduce the existing gas field in the north area of the block, as well as the existing gas plant, Teluk Rendah Gas Plant (TRGP). To increase gas sales volume, JSJB also produces a new field, Hari Field. The main focus and the biggest challenge of this work is of course the reactivation of TRGP that is a gas plant with low CO2 characteristic with a maximum sales gas capacity is 30 MMscfd. TRGP last operated in 2010. TRGP reactivation is carried out for all existing equipment and systems, including piping, pipeline, static and rotating equipment, electrical and instrumentation devices, control systems, data and telecommunication, building and infrastructure, etc. Technically, the major challenges faced are the need to upgrade the obsolete system and software, uncertainty in the performance and physical condition of equipment, also adjustments of new operating philosophy and equipment parameters because the gas plant will be operated in the lower normal operating flowrate than before and with a different gas composition that gas from Hari Field has CO2 content of above 5% (maximum sales gas specification). So that in this reactivation project an upgrading work of the gas plant also carried out by adding CO2 removal unit. From non-technical perspective, the challenge is to get the most efficient and economic project cost due to too many uncertainty factors. Another thing that is very important for the success of this project is the health aspect because this work was carried out during the covid-19 pandemic condition. This project was carried out using good project management, until finally the north area of the South Jambi B block was able to reproduce with an initial gas volume of ± 2 MMscfd in June 2021 and increased to ± 7 MMscfd after installation of CO2 removal in December 2021. This is intended to share the knowledge and experience from the reactivation work of gas plant that has been shut down for a long time, with the hope of providing additional references for oil and gas practitioners who have the same cases.