Hoa spent almost forty years in education, most of them at Vietnam's People's Police Academy, where he rose to vice dean of foreign languages. The academy's cadets must meet a language standard to graduate, and Hoa's faculty ran the classrooms that got them there. Retirement ended the salary. It did not end the work.
Since 2018 he has taught free classes in Bat Bat commune, on the northwestern outskirts of the capital. He plans every session personally — pronunciation, everyday conversation, the mechanics of exams. What he is after is not recitation. He drills the reflex of speaking, the split second in which a learner decides to open their mouth rather than search for the rule.
He asks nothing of the people who walk in.
The commune around him is not old. Bat Bat was assembled in July 2025 from five former communes when Vietnam dissolved its district tier, reviving a name that had vanished from the map for 57 years. It covers 56.43 square kilometres and holds just over 40,000 people. The classes predate the commune by seven years.
The need is measurable. Vietnam scored 500 in the 2025 EF English Proficiency Index, ranking 64th of 123 countries, and Hanoi posted the country's highest city score. But in the same year's upper-secondary exit examination, more than a third of English candidates finished below five out of ten. Between the national average and the pupil who cannot speak lies a gap that no ministry fills on a Tuesday evening in a midland commune.
Hoa fills it. Among his students are retirees like Kim Phuong, who returned to a beginner's alphabet long after anyone expected it of her, and who now sits where the children sit. That is the whole arrangement: a man with spare hours, a door left open, and a generation or two in the same room learning the same vowel.