Vows of trust

A copy of a personal undertaking signed in Tokyo by Sun Yat-sen and his wife, Soong Ching-ling, is at the center of an ongoing Beijing exhibition. Lin Qi reports.

The day after they registered their marriage in Tokyo on Oct 25, 1915, the great revolutionary Sun Yat-sen who died in 1925, and the late Soong Ching-ling signed a pledge.

In the document written in Japanese at a lawyer friend's house, they promised to complete the Chinese legal procedure for marriage as soon as possible, try to keep each other happy and raise no objection to legal or social punishment for violating the pledge.