By Gerald Flynn Several Cambodian journalists helped to report this investigation, but have requested not to be named due to the sensitive nature of the story. SIHANOUKVILLE, Cambodia — On a rain-sodden day in September 2023, reporters entered the Sihanoukville Special Economic Zone on the southwest coast of Cambodia, in the country’s largest port city. Established in 2008 through a partnership between Chinese and Cambodian private companies, the Sihanoukville SEZ hosts a range of Cambodian and Chinese ventures exporting products worldwide. Among them is Nature Flooring (Cambodia), a Chinese-o…