Which museum in Beijing has mirrors?

Dongsi Hutong Museum, Beijing Lovelorn Museum.

1. Dongsi Hutong Museum, located at No.77 Dongsi alley, Dongcheng District, Beijing, has a haha mirror named Xingtian in the courtyard.

2. Beijing Lovelorn Museum, located at Floor in882, Yintai, Wangfujing, Beijing, No.88 Wangfujing Street, Dongcheng District, Beijing, has a built-in haha mirror.