Although the times through which he lived were uncertain,at times cruel and predominantly harsh,the life of Zhang Wentang was one of pure scientific endeavour.The many obstacles which presented themselves during his lifetime would have discouraged and defeated most good men.It is the ultimate tribute to the man that he overcame so much hardship in his pursuit of knowledge and yet remained steadfastly focussed on his predetermined aims.While many good strong men deliver outstanding lifetime contributions Although the times through which he lived were uncertain, at times cruel and predominantly harsh, the life of Zhang wentang was one of pure scientific endeavor. The many obstacles which presented themselves during his lifetime would have discouraged and defeated most good men. It is the ultimate tribute to the man that he overcame so much hardship in his pursuit of knowledge and yet staying steadfastly focus on his predetermined aims.While many good strong men deliver outstanding lifetime contributions