民国三十年,冬至。蒸汽喷涌而出,伴着鸣叫,列车在华北大地上疾驰而过。巨大的车轮滚动着,与铁轨发出规律的撞击声,地面上细小的沙土震动着、跳跃着。车厢上是显旧的一块牌子:“上海——北平”。车厢里的男人,黑风衣、黑礼帽,目光深沉而坚定。他是上海一家大剧院的前台经理宋成伟,更是国民党军统的高级特务,夜鸦。北平,福寿居。这是一家餐馆,中式结构,装潢豪华,同时也是中共地下党 In thirty years, the winter solstice. Steam spewing out, accompanied by tweet, the train gallop in the North China over. Huge wheel rolling, and the track issued a regular percussion, the ground on the small sand shaking, jumping. The car is a sign of the old: “Shanghai - Peking ”. Car in the men, black windbreaker, black hat, eyes deep and firm. He is the front desk manager of a Grand Theater in Shanghai Song Chengwei, but also the senior agent of the Kuomintang military system, Night crows. Peking, Fushou living. This is a restaurant, Chinese style, luxurious decoration, but also the CCP underground party