财税〔2018〕164号
Notice of the State Taxation Administration on the Exemption of Individual Income Tax on One-time Compensation Income Obtained by Employees of State-owned Enterprises Due to Termination of Labor Contracts
国家税务总局关于国有企业职工因解除劳动合同取得一次性补偿收入征免个人所得税问题的通知
This document specifies the policy on individual income tax exemption for one-time compensation received by state-owned enterprise employees upon contract termination, but it has been abolished as of January 1, 2019, per the transitional rules in the revised Individual Income Tax Law.