On February 11th, Chengdu Municipal Bureau of Local Tax released the report on the city's individual income tax revenue during the "Eleventh Five-year Plan" period: the total income tax in last five years amounted to 20.384 billion yuan, quadrupling that of 4.983 billion yuan in the "Tenth Five-Year Plan" period; the economic growth has provided the tax source foundation for the growth of individual income tax.