摘要: The First International Mine Planning and Development Symposium, sponsoredby China Coal Society, Chinese Society of Metals, World Mining and World Coal forpromoting technical exchange among world mining circles, will be held in China onSeptember 18-27. On behalf of my colleagues in mining circle of our country I wouldlike to take this opportunity to extend a warm welcome to friends from differentcountries to participate in such a grand meeting. In their struggle to conquer nature