There were popular goods that were traded along the Silk Road. Things such as Frankincense (an aromatic resin obtained from trees), Gold, Spices and Silk were originated from different countries along the route.
During the 15th century, Singapore's status as a key trading port was overtaken by a new port city, Melaka. Melaka became the main port of call for the imperial Ming navy whenever it passed through the Straits of Melaka. The reason is that Melaka pledge loyalty to the Ming emperor.
During the rise of Melaka, Singapore continued to serve as a port. However, it was not as popular with traders as Melaka. Due to decline in trade, Singapore was given up to Melaka by their overlord, the Siamese. Therefore, Singapore came under control of the rulers of Melaka in the 15th Century.
Singapore also had connections with the Johor-Riau Sultanate (16th to Early 19th Century).
Therefore there are lots of artefacts from Malay Kingdoms found in Singapore. Such as the malay gold coins from the 16th to the 18th century. They were found along the Kallang River. Together, these artefacts show the connections that existed between Singapore and other Malay kingdoms in the Malay Archipelago.
(Gold coins recovered from the Kallang River)