DON'T BUY, irresponsible seller. Same as one of the buyer previously, on 1st use, pan inside turn black yellowish, I was trying to season the pan and 1st wash, dry, then heat on stove at medium heat, pour in vegetable oil, spread around the whole pan. Then when I use a kitchen towel to clean it see that the paper is covered with blackish stuf. Paper was NOT burned, it turns out one sector of the pan turned black during heat and I think due to the uneven coating hence heat all concentrate there. After pan cooled down I check the sector is yellowish.as shown in pictures. So scare to eat black whatever nano coating toxic .Each time I use it, more black charred surfaces appear, even boiling water at low fire. Throw money on a wok that cannot meet fire....

Delivery was fast and I used it 2 days after receiving. Noted that the front and back both turned “yellowish” after first use. If this means the pan is charred..I have concern to continue using it (see pictures)