Betrothal (过大礼)

What Is It?

This is given by the groom to bride’s family. Traditionally, brides are not allowed to use anything from the betrothal package. Brides are also not allowed to receive the groom when he delivers the package and wedding invites can only be sent out after the betrothal package is delivered

Unlike Cantonese/Hakka, Teochew/Hokkien will deliver the betrothal package on 2 separate days.

When and What to Give?

The betrothal gifts are delivered up to a month and at least three days before the wedding day. The groom and a friend or a matchmaker will deliver the gifts on the auspicious date chosen. 

First Day (送日子)

• A partial amount of cash gift (Bride's 'Price')
• 10 or 12 mandarin oranges
• Cream biscuits/crackers
• These has to be delivered at the pre-arranged auspicious hour. Once the bride’s parents accepted the gifts, the groom may proceed with part 2 of the betrothal package…

Second Day (送礼日)

• The remaining portion of the cash gift (Bride's 'Price')
• Traditional Wedding Biscuits
• 12 Mandarin Oranges
• Cream Biscuits/Crackers
• A Whole Roasted Pig
• 2 Whole Chicken
• 2 Bottles of Whiskey/Cognac
• 3 Sets of Rice Snacks/Candies (3 with sesame, 3 with grains)
• 2 Bolts of Red Cloth
• 2 Pairs of Dragon-Phoenix Candles
• 4 Pieces of Gold Jewellery(四点金); earrings, necklace, bracelet, ring

Notes About Cash Gift / Bride's 'Price' / 娉金

Some people also call the bride’s price "bride's dowry". It is either pre-agreed during the wedding negotiations or the bride’s parents may leave it to the groom’s side to decide.

It is usually presented in a red packet or wrapped in a special red cloth. Even amounts are presented. For average income families, $600 to $2,000 are commonly given. The groom’s side will usually prepare slightly more than the pre-agreed amount.

A portion is expected to be returned to indicate that

• the groom’s family is overly generous,
• the bride’s family is not greedy, and
• the two families will share their good fortune.
• For example, the groom may present a red packet of $1,200; the bride’s parents may keep $800 and return the balance in the red packet.

Source:
http://www.weddingbells.sg/traditional-chinese-wedding-customs-you-need-to-know-teochewhokkien/