Qinghuandao is more than likely the most pleasant Hebei city - at least it's on the coast, unlike the rest. For vibrancy, Tangshan would be my choice. As for anywhere else in drought-stricken Hebei, I'd give them all a miss. Shijiazhuang is one of the most polluted and boring of China's provincial capitols. Others I've been to that are just as dirty, drought-stricken and boring are Taiyuan, Xi'an and Lanzhou. Jinan is okay though, but nothing special! As for the environment and vibrancy of the provincial capitols of the south of China, I can't comment as I've never taught there.