Let's talk about what refills are best to write, lasting and smooth.

First of all, in the stationery industry, Japan and South Korea are quite good. Personally recommend several useful ones.

Black pen

East Asia, zebra, Mitsubishi,

Paitong

dance (party)

... not bad. Chen Guang is a Sino-Korean joint venture and a first-line stationery in China. Generally, there will be no oil shortage. You have to be in a regular stationery store, otherwise it is.

correction fluid

Write on (a tape) to block the pen beads. The "exam-only" one is very bad