Sailors work in difficult, occasionally dangerous surroundings, reports Peng Yining from the Gulf of Aden

Editor's note: On June 10, the Peace Ark embarked on a 118-day voyage to provide medical assistance in a number of countries and take part in joint operations and exercises with fellow members of ASEAN. This is the sixth report by China Daily's Peng Yining.

Chen Hailei joined the navy to see the world, but so far the 25-year-old has only seen piles of garbage and a trash incinerator. His job on the Chinese hospital ship Peace Ark is to take care of garbage disposal.