





This is read with the -n rhymes only, i.e. the mark on the rhyme is interpreted as the final -n. Omitting the mark is read as omitted -n. Ông mark is read as final -ng or modifying -n to -m.
The text reads: Nam quốc sơn hà Nam đế cư Tiệt nhiên định phận tại thiên thư Như hà nghịch lỗ lai xâm phạm Nhữ đẳng hành khan thủ bại hư.
The nhập tones make it very hard to quickly scan a text. Here is a way to improve readability when writing nhập tones. Instead of moving the tone mark to the bottom right, move the whole rhyme symbol to the bottom. The tone mark can stay at the top or move it to the bottom, too. That way it í easier to distinguish the final consonant, i.e. m/n/ng vs p/t/c.