After a dismal first six months of the year, things are looking up for initial public offerings (IPOs) in Hong Kong as several large Chinese firms line up to list in the territory in the second half. Battery materials producer Tianqi Lithium Corp (????) just opened its books for what is set to be Hong Kong’s first debut of the year that is expected to raise more than US$1 billion, while China Tourism Group Duty Free Corp (????????) might relaunch an offering of about US$2 billion. Along with several other medium-size to large deals in the pipeline, they are poised…