4. Short Background The highlanders who barely had access of seawater, because of the presence of rice terraces, only the central mountains of Luzon had well structured livelihood that resulted to a more fixed territory.
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8. Economic Status The chief means of trading was barter. Records show that Chinese merchants came to the Philippines to trade porcelain, silk and metal ware in exchange for gold, pearls, and medicinal plants, which the Philippines is naturally rich in.
10. Jocano refers to the time between the 1st and 14th Century AD as the Philippines' emergent phase. It was characterized by intensive trading, and saw the rise of definable social organization.
11. The advancements that brought this period were made possible by the increased use of iron tools, which allowed such stable patterns to form.
12. This era also saw the development of writing. The first surviving written artifact from the Philippines, now known as the Laguna Copperplate Inscription, was written in 900 AD, marking the end of what is considered Philippine Prehistory and the beginning of Spanish era.
13. Excavations also unearthed gold ingots, known as piloncitos,the first recognized form of coinage in the country. Barter rings in different sizes, gold ornaments and beads were the other objects used as medium of exchange during the period.