After days of stalling, the bill was jointly signed with COVID-19 stimulus package that includes $900 billion aid.
The US House of Representatives passed unanimously the Taiwan Assurance Act in May 2019 when it was added to that fiscal year's spending bill for the Senate to consider.
The act aims to strengthen bilateral ties between the two countries and encourages Taiwan to increase its defense spending.
Since the act passed the House, the Trump administration has approved eight arms sales to Taiwan, which include anti-ship cruise missiles and drones.
The act also includes Washington's support for Taiwan’s meaningful participation in the UN and other organizations, and provides $3 million for activities of US-Taiwan Global Cooperation and Training Framework.
China considers Taiwan – officially known as the Republic of China – a breakaway province, while Taipei insists on its independence since 1949 and has diplomatic relations with 16 countries and regions. With the US expressing open support to Taiwan and selling high-tech weaponry to Taipei, China has increased its military operations in the region.