Tianjin and Phnom Penh are friendly associated on October, 11th,  in 2002.

Phnom Penh is the capital and largest city of Cambodia. It is also the capital of the Phnom Penh municipality. It is an economic, industrial, commercial, cultural, tourist and historical center in the country. Once known as the "Pearl of Asia",Phnom Penh, along with Siem Reap, is a significant global and domestic tourist destination for Cambodia. Phnom Penh is known for its traditional Khmer and French influenced architecture.

Phnom Penh is the wealthiest and most populous city in Cambodia. It has a population of 1,242,241(2009-05). It is also the commercial, political and cultural hub of Cambodia.

Double-digit economic growth rates in recent years have triggered an economic boom, with new hotels, restaurants, bars, and residential buildings springing up around the city. Phnom Penh's wealth of historical and cultural sites makes it a very popular tourist destination.Nowadays, the market is a tourist hot spot. The four wings of the yellow coloured Phsar Thom Thmei are teeming with numerous stalls selling gold and silver jewellery, antique coins, clothing, clocks, flowers, food, fabrics and shoes.