I've read some of those on the GD forum (other forums) who had issues with their china and VN made Sailun.
Some were pretty sketchy reports like running the 235/85-16 G at 4400 lbs capacity with only 80 psi for two years. Thats simply tire abuse especially on a heavy sidewall tire... BTDT and a expensive lesson learned.
Others were not the 16" load G but said they were 17.5" H load range Sailun S637 or just Sailun tires.
And one motor home owners reported his 22.5" Sailun lost a tread but no details.
Some never gave any details other than just my Sailun made in china or made in VN.
One had deep chunks and rubber on that one same side of the tire ground down like a metal object getting hung up in the wheel well doing the damage.
I saw only two (on three different rv forums) that gave all the particulars that pointed to 16" G S637 tire issues. The rest IMO were owner neglect or ignorance of derating psi on heavy tires or cuts and bruising from admitting to rolling over curbs/etc.
Sailun has around a dozen different lines of tires for commercial trucks/trailers ranging from 16"/17.5"/19.5"/22.5"/24.5". Sailun S637 16" load G is just one of them.
I would run them but make a quick looky at the tires tread on every stop. you make