Hong Kong tchoukball player Lin Pak-hei feels rusty for not practising the team sport for half a year because of the Covid-19 pandemic.The closure of schools and sports facilities in January left the 29-year-old and about 50 members of the Hong Kong tchoukball team with nowhere to train. Two international tournaments were also cancelled.When schools briefly reopened in late May after the Covid-19 situation stabilised, players rushed to book courts and resume training.“I felt like my arms and…