Why do Vietnamese still use Chinese characters on newly built structures even though you have a Latin-based writing system?

If you are a foreigner you will find it so strange, but we don't, it's a part of our culture, we don't use Chinese characters in document anymore, but we don't say that we don't use it to decorate

This is our ancestral culture, we still pass down ancient architecture and writing to this day

After a 100-years war, most of the ancient structures were destroyed by the war. All ancient citadels in Vietnam were destroyed by bombs and bullets, now only remnants of the war remain, with a few ancient Chinese characters still engraved on them.

Thang Long (Ha Noi) Gate: attacked by artillery. Currently, only the city gate remains, the city wall has collapsed.

Chinese characters in Vietnam are sometimes read from right to left, sometimes read from left to right, 😵😵 and I am illiterate. 😅😬. I just think it matches the ancient decoration quite well, but I don't understand what they wrote, 😂