The images of the 4 stamps depicts the following:

Merchant Ships

Between 1405 and 1433, Admiral Zheng He commanded a fleet of 62 treasure ships and more than 100 other vessels to Malacca and 30 other countries in the South China Seas, Indian Ocean, Arabian and Mediterranean Sea.  The ship carried crews of sailors, officers, translators, warriors, pilots, medicinal experts and craftsmen. Merchant ships also brought with them silk, porcelain ware, tea and gun powder for trading in exchange for local spices and other goods such as glassware, oils, textile cotton and fruits from South and West Asia.

The Emperor of China's Royal Seal to the Sultan of Malacca

China and Malacca enjoyed good diplomatic relations when in 1411, Parameswara led a contingent of 540  envoys to China, in which during the visit, an edict was promulgated appointing Parameswara as the king of Malacca and granted an inscription for the state mountain (country).

A Royal Seal from the Emperor of China was presented to the Sultan of Malacca in recognition of the importance of diplomatic relationship between the two kingdoms. In the following years between 1414 and 1434, other Malacca Sultans also visited China.

Trading in Malacca

During the 15th Century, Malacca developed to become the most important commercial centre in Southeast Asia. Malacca's location and sound government attracted merchants from China, India and Middle East who recognised its potential as an independent port where trade goods could be exchanged.

Nyonya Ceramics

Nyonya ware was first produced during the late 18th Century. These were specially made on consignment for the Strait-born Chinese of Malacca. Nyonya ware is distinguished by their bright colour combinations of pink, yellow, dark blue and green. The designs generally found on the wares are fish, phoenixes, flowers such as roses and chrysanthemums and other favoured animals. These highly treasured wares were produced  in Jiangxi and Guangdong  province of China. They come in different shapes and sizes but were mainly dining sets, tea sets, vases and other such items.

Currency

Besides barter trading, coins and other forms of money were extensively used in 15th Century  Malacca. Early Chinese merchants introduced tin animal money in the form of rooster, tortoise, fish and crocodile. During Zheng He's trade missions in Malacca, copper coins were issued and used by most merchants but were subsequently replaced with tin which were mined and minted in Malacca.