Complex sentence: Chinese presence in Cambodia dated back to the 13th century when Chinese diplomat Zhou Daguan visited Cambodia and in the 16th century, Portuguese seafarers recorded the presence of a Chinese enclave in Phnom Penh in 1620.
Split into simpler sentences: Chinese presence in Cambodia dated back to the 13th century when Chinese diplomat Zhou Daguan visited Cambodia. In the 16th century, Portuguese seafarers recorded the presence of a Chinese enclave in Phnom Penh in 1620.