Officials said they could not rule out the possibility of a meltdown, which occurs when nuclear fuel rods cannot be cooled and melt the steel and concrete structure containing them, at all three troubled reactors at the plant.

FORBES: Fukushima's Last Stand: All But 50 Workers Evacuated

The Company also involves in industrial installation, steel structure, the production of concrete, building decoration, landscape construction, railway construction and electric power businesses, among others.

FORBES: China State Construction

This study found that concrete which contained a high proportion of long steel fibres in its structure worked best.

ECONOMIST: Bunker-busting