SCMP journalist Holly Chik presents the first in a series looking at how the pandemic changed Hong Kong, how its people used social media to support each other among constantly changing restrictions, and how the lessons of SARS point once again to how Hong Kong needs to prepare for the future. Video journalist Thomas Yau reflects on his reporting from Wuhan in 2020, 2021 and 2023, his experiences on the streets of Shanghai, how 60+ days of lockdown changed him, and what changes he sees in his…