Convert from t'sun to millimicron

Unit Definition (t'sun)
The t'sun is a Chinese unit of distance equal to 0.1 ch'ih or about 1.41 inches (3.58 centimeters).

Unit Definition (millimicron)
A unit of metric measurement 1000 millimeters equal one meter, 10 millimeters equal one centimeter, about 25 millimeters is one inch.