Topic - Tangshan

Tangshan is a coastal, industrial prefecture-level city in the northeast of Hebei province. The city's industrialization began in 1870, when Kailuan Group established coal mines in the region. It's the birthplace of China's first standard-gauge railway, the first steam locomotive, It was hailed as China's "cradle of industrialization". Even today, Tangshan is a hub of steel, energy, chemical, and ceramics production. Ping opera, which originated from the city's Luanzhou county, is one of the five most popular Chinese operas. - Source: Wikipedia