This question examines the historical facts about Shenzhen. Pioneer spirit, a city that rose overnight, the earliest representative of the special economic zone refers to Shenzhen, so D was chosen.

Pioneering spirit represents the enterprising spirit of the first generation of builders of Shenzhen Special Economic Zone! Pioneer Cow is located in front of the Shenzhen Municipal Government and is the symbol of Shenzhen. More than 20 years ago, entrepreneurs in Shenzhen, like this pioneer cow, worked hard and made selfless contributions, turning a poor border town into an international modern city. "Pioneer Cow" represents this pioneering and diligent spirit.