Developing a font like Lantinghei Heavy is a massive undertaking. Unlike Latin fonts that require roughly 200–500 glyphs, a professional Chinese typeface must cover upwards of for a single weight. Every character must be individually balanced to ensure that a complex character with 30 strokes doesn't look significantly darker (or "heavier") than a simple character with three strokes. Usage Recommendations
We cannot stress this enough: Founder Type invests significant resources into designing each weight of Lantinghei. If you run a business, budget for the license. The cost is usually modest (often $50–$200 per weight depending on usage).