1. High-end ballpoint pens have obvious trademarks, brand names and model marks on the pen cover. There are also obvious brand names, production dates and "DA" marks on the tail of the pen core (the "DA" mark refers to the two files). The combination of the first letter of the Chinese pinyin of the word).

2. The pen refill must be equipped with a metal oil tube. The pen head ball must be made of hard alloy - tungsten carbide ball. The writing performance is better than that of ordinary ballpoint pens. The ink poured into the pen refill must be made of hard alloy - tungsten carbide ball. 424 pure blue ink and 322 black ink produced at designated locations. These two inks have the advantages of light fastness, water resistance and impermeability. Ballpoint pen refills filled with these two inks can be used for writing archival documents (including plastic tubing refills, but the color of the tubing must be light yellow tubing).

3. On the packaging of the goods, there are signs and marks such as trademark number, model, manufacturer name, place of origin and quality inspection certificate. Fake and shoddy products. The ink filled in the pen refill is not the archival ink approved by the State Archives Administration. There is no "DA" mark on the refill, and there is no trademark, model, factory name, or origin. Some are unbranded pens smuggled in from abroad. The core is assembled and passed off as an imported high-end ballpoint pen.