The moon, sun, and fire represent the origin of the Mongols.
The rectangles and triangles represent honesty and justice.
The yin-yang symbol [Tao] represents vigilance, for it represents two fish, and fish never sleep.
The two upright lines represent the strength of friendship, for two friends standing together are stronger than walls of stone.
(
http://www.buryatmongol.com)
beejgy; mkulkkb helugyg; ohtl
= What is a joke for a cat will be death for a mouse (Mongolian proverb)
[muurand togloom, khulgand ukhel]
Edit: The text above in orange is supposed to be in Mongolian cyrillic...