The vocabulary "一点" is different from the meaning in Japanese (e.g. 一点突破). In Chinese, that vocabulary can be used to describe as "a little bit", and the position (Japanese meaning).
The vocabulary "大筆" contains a counter word "筆". Noticed that the word "筆" can also be a noun "ペン". Next time, when you see the word "筆" following a number (e.g. 一筆,一筆過) , it usually talks about money.