WuSheng Lingdong Auto Retractable Gel Pen 0.5mm Black WS-108

"Lingdong Pen" (灵动笔) from Wusheng Stationery (悟生文具).

It is a gravity-sensing pen that extends the tip when picked up and retracts it when laid down, preventing breakage.

The pen also features automatic retraction of the tip if dropped, protecting the nib.

It is a 0.5mm black ink pen, as indicated by "0.5 BLACK" on the packaging.

The packaging highlights its "Nimble" (灵动) tip and "Wusheng Original" (悟生原创) design, noting it is a patented product.