The fire began on Friday night at the factory in Pingtung County and raged overnight. Three firefighters were among the dead, authorities said.
China last week sent a flotilla of ships including the aircraft carrier Shandong into waters near Taiwan.
Taiwan's defence ministry said 68 Chinese aircraft and 10 naval vessels were detected around the island between Wednesday morning and Thursday morning.
Japan's defence ministry also said Wednesday its navy had detected six ships -- including frigates, destroyers, one fast combat support ship and the Shandong -- sailing through waters.
Hydrogen is a clean energy source. It is mainly used in the refining and chemical sectors and produced using fossil fuels such as coal and natural gas.
China’s frequent use of military and economic tactics to intimidate Taiwan and other neighbouring countries has posed a formidable threat and challenge to security in the Indo-Pacific and the world.
Reports stated that by partnering with STMicro, contract manufacturer Foxconn is tapping the expertise of a chip industry pioneer to expand in the lucrative but difficult semiconductor business.
Haikui's arrival came as Typhoon Saola continued to weaken while swirling along the Chinese coast, where 900,000 people and 80,000 fishing vessels had been moved to safety.
The storm had maximum sustained winds of 137 kph, with gusts up to 173 kph, according to the island’s meteorological bureau.
However, a growing number of Chinese vessels have sailed within what is referred to as the nine-dash line, and sometimes beyond the boundaries in last few years.
Wittman, a Republican, is vice chair of the House Armed Services Committee, which oversees funding for the US military and is leading a delegation on a three-day visit to Taiwan.
China, which considers self-ruled Taiwan as part of its mainland, routinely objects to any high-level visits to Taipei, saying that it is a violation of the one-China principle.
Britain’s top diplomat, James Cleverly, began the long-awaited visit to China on Wednesday as the two countries attempt to stabilize their ties that have frayed badly in recent years.
Khanna said he did not agree with Vivek Ramaswamy who said on Tuesday that he would wish India to close Malacca Strait in the case of a Chinese invasion of Taiwan.
He has long had presidential aspirations. He ran in the 2019 election but lost as Tsai Ing-wen of the Democratic Progressive Party easily won re-election.
Beijing suspended individual tourism permits to Taiwan in 2019 in a sign of worsening relations under Taiwanese President Tsai Ing-wen, who refuses to accept China's claim over the self-ruled island.
Taiwan deployed aircraft and vessels and activated land-based missile systems in response to the drills and was closely monitoring the situation, the ministry said.
State media CCTV reported that missile-equipped boats and fighter jets were involved in the operation and that units worked together to simulate the surrounding of Taiwan.
Taiwan is claimed by China, which has vowed to take the democratic island one day -- by force, if necessary -- and ramped up political and military pressure against it.
Taiwan's #MeToo movement was reignited in May when a young woman who worked for the ruling Democratic Progressive Party accused film director Hsueh Chao-hui of groping her and making sexual advances.