Hi,
Please do not post several time the same question in the forum and do not "act" as a "spammer".
We answer to all question so don't worry, we will answer you but no in the second and not in the minute.
Product custom fields are a feature of HikaShop business, you can configure them to be displayed in the front-end, in the backend form and in the backend listing.
Regards,
Jerome - Obsidev.com
HikaMarket & HikaSerial developer / HikaShop core dev team.
Also helping the HikaShop support team when having some time or couldn't sleep.
By the way, do not send me private message, use the "contact us" form instead.