dà​róng​lú

melting pot

大熔炉 大熔爐 dà​róng​lú
melting pot
a place where different ethnicities, cultures, or backgrounds blend together into one
crucible
a metaphor for an environment or place that tests, tempers, and develops individuals into better or more capable people
large smelting furnace
a large furnace used for melting and refining ores or metals