The new president of Egypt has called on the country to "differ for the sake of our nation and not over it", during his acceptance speech at the Supreme court in Cairo.
Al-Sisi also thanked the outgoing interim president, before both men signed the "handover of power document" in the presence of dozens of local and foreign dignitaries.
More top news
The maintenance worker spent 10 days in hospital after plunging 9.5 metres from a scaffold tower at a disused station.
Workers and managers are to stage another strike on Saturday amid a long-running dispute over jobs, pensions and closures.
The unexpected call could prompt a diplomatic rift with China, which regards Taiwan as a breakaway province from its mainland.