Watch the stroke order, then trace it yourself.


nitrification
smoke of gunpowder
saltpeter; niter
nitric acid
Ancient craftsmen used saltpeter to make gunpowder.
After the war ended, the smoke of gunpowder still lingered on the battlefield.
Dangerous nitric acid is stored in the chemistry lab.
Explore characters by relationship
Characters pronounced "xiao".
Characters with radical "石".