More than 5% of common and he'd legally have had to report it and as CEO he'd have to report owning any as an insider so it's safe to say he has none.
Besides heres my updated math in my pinned DD
$XMET 8-k math if exact 93%
1PS=100 voting rights
1CS=1 voting right
100M PS = 10B voting rights
100M PS = 93% voting rights
10B(PS voting rights) / .93 = 10752688172 total voting rights
10752688172-10B(voting rights PS) = 752688172 voting rights/common shares in float.
However 8-k states preferred shares gave CEO approximately 93% control so if you base the math to include the difference of valid / invalid shares 9b valid -- 8,197,627,462 invalid = 802372538 shares. That still gives Wei Tian approx 93% voting rights with 100m preferred shares... 100m * 100 = 10b + 802372538 = 10802372538.
10000000000 / 10802372538 = approx 92.57% or approx 93% voting rights.
ALL STATEMENTS REPRESENT PERSONAL OPINIONS AND SHOULD NOT BE USED FOR ADVICE