Qin Shi Huang, the first Emperor of China
died in 210 B.C.
He was on a tour of eastern China
and his Prime Minister, Li Si, and Chief Eunuch, Zhao Gao,
did not want the news of the death to leak out.
They wanted to consolidate their power back at the capitol.
So they covered the stench of the rotting corpse
by having two carts of rotting fish be placed ahead
of the decomposing Emperor for the rest of the tour.
FOR TWO MONTHS!
And it worked.