This pen is called Bai Le ·DPN-70. From the appearance, it belongs to the retro slim pen container design. You can choose to use ink bag or Baile CON40 ink roller.
Unfortunately, this pen has been discontinued, and all the products available at present are in stock, and the price is relatively expensive, about 130 yuan. The new replacement model is called DPP-70, which is not as beautiful as the old one.