# Record experience
According to Hong Kong police, an Arup employee working there received a message purporting to come from the firm's chief financial officer (CFO), who was based in London, regarding a "confidential transaction".
，推荐阅读新收录的资料获取更多信息
Poincaré half-space model. Take the open upper half-space \[\mathbb{H}^n := \{(x_1,\dots,x_n)\in\mathbb{R}^n \mid x_n 0\}\] equipped with the Riemannian metric whose components on the coordinate tangent vectors are \[g_{ij}(p) \;=\; g_p\!\left(\frac{\partial}{\partial x_i}\bigg|_p,\; \frac{\partial}{\partial x_j}\bigg|_p\right) \;=\; \frac{1}{p_n^2}\,\delta_{ij}.\] Geodesics are semicircles (or rays) orthogonal to the boundary hyperplane \(\{x_n = 0\}\).。新收录的资料对此有专业解读
- docs/features/TEMPLATE.md — FD file template