Hi Oink Oink,
Pin Jing is part of Pin Li. Pin Li is termed as engagement gifts. About 2 weeks before AD, (the guy's side will choose the date), gifts will be delivered to the gal's side. What is delivered is usually stated before hand to the guy's parents by the gal's parents. Usually, it will include some liquor, oranges, dried foodstuff... auspicious items for a wedding. These, together with a big red packet (known as Pin Jing) will be given to the gal's parents.
A few days later, the gal's parents will return part of the Pin Jing (returned in the same envelope), together with a small quantity of each of the different gifts previously delivered by the guy's parents. It is also at this time, the gal's parents will deliver back to the guy's house, the jewelery that they buy for their daughter, some household utensils, gifts for the new SIL (watch, glasses, pen, belt, shoes, clothes) - these items will vary from dialect group to dialect group and is collectively known as "jia zhuan" (dowry). There may also be some items of clothing for the husband's siblings (these vary from dialect group).
If you are not a teochew, it would not be in tradition to request for SDJ... but of course, you can request for it. But you may run the risk of your in-laws saying you are greedy.
However, whether you are teochew or not, in-laws will always buy a piece of jewlery for the new DIL to show that they accept her into their family.
If you really want a SDJ, perhaps waht you can do is to try find out if your in-laws intend to buy you a piece of jewlery... and try to find out the budget. I know Poh Heng sells yellow gold SDJ at about $1.5k for the cheapest range.
If your in-laws say they will buy you a piece of jewlery and you found out the budget, you can tel your husband you would really like a full set of SDJ cos it looks very impressive and will make your in-laws look very generous.. then work within that budget but buy 4 items..
Be prepared though, that 4 items will not look as impressive as just 1 item, for the same budget.