(Image: [[https://banthodongtam.vn/wp-content/uploads/2024/03/hoa-don-mau-hong-dai-dien-cho-tinh-mau-tu-nen-thuong-duoc-dang-cung-cha-me-ong-ba.png|https://banthodongtam.vn/wp-content/uploads/2024/03/hoa-don-mau-hong-dai-dien-cho-tinh-mau-tu-nen-thuong-duoc-dang-cung-cha-me-ong-ba.png]])-- Answer-- It is now the 21st [[https://www.gov.uk/search/all?keywords=century|century]].. A  bangcacloai.com ([[https://bangcacloai.com/lam-chung-chi-nghe-han-2025/|Bangcacloai post to a company blog]]) [[https://wideinfo.org/?s=century|century]] is 100 years..
So you can guess it was 200 years ago..