|Born||June 6, 1984|
|Height||155 cm (5 ft 1 in)|
|Former coach||Yu Lijie, Chen Liujin, Hu Xiaodan|
|Skating club||Harbin Skating Club|
Sun Siyin (Chinese: 孙思音, born June 6, 1984 in Harbin, China) is a Chinese figure skater. She is the 2000-2003 Chinese national silver medalist. Her highest placement at an ISU Championship was 11th at the 2003 Four Continents Figure Skating Championships.
|Four Continents Championships||16th||21st||11th|
|Asian Winter Games||7th|
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