Phraya Ratsadanupradit Mahison Phakdi; born Khaw Sim Bee; was a Thai provincial administrator. He was the youngest of the six sons of Khaw Soo Cheang; a trader from Zhangzhou in China.

As a member of the na Ranong family which held the governor's post in Ranong for generations; Khaw was assigned to become governour of Trang in 1890.

His most significant contribution was the introduction of the rubber tree to Thailand; which at his time was only grown in Malaysia. It has since become one of the major crops of Thailand. He also initiated the connection of Trang with Nakhon Si Thammarat and Phatthalung by road as well as the railroad connection to Nakhon Si Thammarat; one of the first railroads of Thailand.

In 1902 he was assigned to become the commissioner of Monthon Phuket; where he stayed till his death in 1916. A monument commemorating him was erected in the city of Trang.

Trang has been a trading center since at least the 1st century AD. It grew to prosperity between the 7th and 13th centuries during the Srivijaya period and remains an important commercial town today.

Rubber; palm oil and fishing are the mainstays of the town's economy. Tourism is making an increasing impact as Trang's Anadaman Coast and islands are increasingly developed and popularized.

The town has a strong Overseas Chinese character (and hence good Chinese restaurants) as a result of an influx of Chinese labor in the latter half of the 19th century.