南非采购需求：和纸胶带、计划贴纸、牛皮便签、日记卡、翻领别针、金属书签

I am interested in placing an order for approximately 3,000 units of private label blank liquid ink pens equipped with a fine metal tip of 0.5mm. These pens should maintain a high standard of quality, as they will be used for a retail product line. It's essential that the ink flows smoothly and the writing experience is comfortable for users. Also, could you please confirm whether your factory is located in Guangzhou? This information would help facilitate logistics and further discussions about the order. Looking forward to your prompt response regarding pricing, production time, and potential customization options.