I want to know the answer to the following question:
When was the Chengdu Economic and Technological Development Zone approved?
All the background I'm provided with is that "Chengdu Economic and Technological Development Zone (Chinese: 成都经济技术开发区; pinyin: Chéngdū jīngjì jìshù kāifā qū) was approved as state-level development zone in February 2000.". Is that enough to answer the question?