On April 4, Hong Kong Chief Executive Carrie Lam Cheng Yuet-ngor announced that she would not be re-elected. In this way, Carrie Lam's five-year governance in Hong Kong finally came to an end. From the handover in 1997 to the end of Carrie Lam's term of office, Hong Kong's "fifty years unchanged" has just passed halfway through, which is equivalent to the end of the "first half". Lam Cheng took office in the "Basic Law Era" and ended in the "National Security Law Era". His resignation also means the end of an era in Hong Kong. Interestingly, in the first half of Hong Kong's return to the motherland, no chief executive could complete a full two-term (ten-year) term.
Tung Chee-hwa stepped down midway through his banner design second term. In terms of tenure, the second chief executive, Donald Tsang, was the only one who had a "good death": he took office halfway after Tung Chee-hwa stepped down, and was re-elected to complete his second term (so he was not eligible to run for re-election). After leaving office, however, he was one of the worst, and was jailed for embezzlement ("misconduct in public office", which was only upheld on appeal after serving his sentence, and the conviction and sentence were eventually quashed).
The next Leung Chun-ying and Carrie Lam have only one term. What's more, when these four chief executives took office, they all had quite positive expectations, but when they stepped down, they were all negative. When Tung Chee-hwa stepped down, "Let's Step Down, Tung Chee-hwa" written by a writer known as "Hong Kong's No. 1 Talent" became famous: "Tung Chee-hwa, you are the most fundamental disaster, Hong Kong people really don't need you." When Donald Tsang stepped down, Everyone called him "greedy". When Leung Chun-ying stepped down, people in Hong Kong said "ABC" (Anyone But CY). Now that Lam Cheng has stepped down, it is almost "reviled by thousands of people", and it is just a composition competition to see who can be more scolded.