how to write zheng dang(just when) in chinese

正当

pinyinzhèng dāng
eanglish meaningjust when; just the time for; honest; reasonable; sensible; proper; rightful; rational and legitimate

Stroke order of the Chinese words "正" (zheng) detail about chinese character 正

Stroke order of the Chinese words "当" (dang) detail about chinese character 当

Handwriting

1. 正当年
in the prime of life; in one's prime;

2. 正当时
in the nick of time; the right season or time;

3. 正当同学们热烈讨论的时候，老师进来了。
The students were in the midst of a lively discussion when the teacher came in.