Chain stitch is a sewing and embroidery technique in which a series of looped stitches form a chain-like pattern. Chain stitch is an ancient craft - examples of surviving Chinese chain stitch embroidery worked in silk thread have been dated to the Warring States period (5th-3rd century BC). Handmade chain stitch embroidery does not require that the needle pass through more than one layer of fabric. For this reason the stitch is an effective surface embellishment near seams on finished fabric. Because chain stitches can form flowing, curved lines, they are used in many surface embroidery styles that mimic "drawing" in thread.

Chain stitches are also used in making tambour lace, needlelace, macramé and crochet.

Chain stitch and its variations are fundamental to embroidery traditions of many cultures, including Kashmiri numdahs, Iranian Resht work, Central Asian suzani, Hungarian Kalotaszeg "written embroidery",Jacobean embroidery, and crewelwork.

Chain stitch was the stitch used by early sewing machines; however, as it is easily unraveled from fabric, this was soon replaced with the more secure lockstitch. This ease of unraveling of the single-thread chain stitch, more specifically known as ISO 4915:1991 stitch 101, continues to be exploited for industrial purposes in the closure of bags for bulk products.

The Classic (Hangul: 클래식; Keulraesik) is a 2003 South Korean melodrama / romance film directed by Kwak Jae-yong.

The film tells the parallel love stories of a mother and daughter. The story of the mother is told partially in flashbacks.

The movie starts in the present day. The daughter, Ji-hye (Son Ye-jin), is cleaning-up around her house when she comes across a box full of old letters and a diary that detail the story of her mother, Joo-hee (who is also played by Son Ye-jin). Periodically in the movie, Ji-hye reads one of these letters, which starts a flashback scene in which the story of the mother is told. These flashbacks are intertwined with Ji-hye's own story, in which she falls for a fellow student, Sang-min (Zo In Sung), who is involved with the school theater.

The movie tells the story of both relationships. The mother, Joo-hee, visits the countryside as a student one summer and meets Joon-ha (Jo Seung-woo). Together they explore the countryside, playing near a river which they both will always remember as their special place. When a storm starts they take shelter together under a tree, but not before Joo-hee twists her ankle and is rendered helpless. Joon-ha carries her on his back and they struggle home, only to be confronted by her angry parents. Before they separate, Joo-hee gives him a necklace, which he keeps close as a precious reminder of their time together.