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Coin 1 was placed in wrong orientation, it should be rotated clockwise by 90 degree. It reads 治平元宝(1064 - 1067), North Song Dynasty during Emperor Yingzong.

Coin 2 reads 开元通宝, most likely a coin of Tang Dynasty, a few hundreds years earlier than the coin 1.
These are some coins of Song Dynasty during Emperor Zhenzong's era (997-1022), discovered in the ocean near Natuna Island.

It means four hundred years before Zheng He's Treasure Fleets (https://buff.ly/2yyrpCB), Chinese ships had already travelled as far as to Indonesia.
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