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In page Phnom Penh:

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By the 1920s, Phnom Penh was known as the "Pearl of Asia", and over the next four decades, Phnom Penh continued to experience rapid growth with the building of railways to Sihanoukville and Pochentong International Airport (now Phnom Penh International Airport). Phnom Penh's infrastructure saw major modernisation under the rule of Norodom Sihanouk.[citation needed]