You can make use of this online service to make an appointment for applying extension of stay before visiting the Immigration Headquarters or Branch Offices. You can save queuing time by enjoying 24 ...

If you are applying to extend your stay in Hong Kong you can now do so through a convenient online service. Here you can learn about who is eligible to use the service, how to use it and where to go ...

Pythagoras的Bitcoin-beating fund（比特币跑赢基金）持有约500万美元的资产，是Mitchell Dong在其公司管理的约1.3亿美元资产中运行的四种策略中规模最小的。 其他三只基金并没有带来同样惊人的回报：今年迄今为止，它们的收益率在13%至34%之间。

毕达哥拉斯（Pythagoras）学派对形数已有所研究，包括三角形数，正方形数，五边形数，等等。并且似乎也知道两个连续的三角形数是一个正方形数。但他们可能没能给出一般的证明。 先介绍最基本的三角形数和正方形数，再来研究五边形数及任意k边形数。