I had Al Haitham C0 previously but wanted 2 Yunjin's to get C6. I was only at 20 pity and have never had a 5 star character under 74 pity before (soft pity). So I thought I may as well try for Yunjin... here we go
Note: C1 Al Haitham is borderline useless as a constellation if you use him correctly.