【明報專訊】THE day after Xi Jinping, general secretary of the Communist Party of China (CPC), issued in Beijing the declaration that "the country must be unified and without doubt will be unified" on the 40th anniversary of the issuance of the "Message to Compatriots in Taiwan", four heavyweights in Taiwan's pro-independence camp published an open letter, calling on president Tsai Ing-wen to "give up her reelection bid" and "hand over the administrative power and take a back seat".