diff --git a/12.temporary_ins/15.electrokinetics/20.overview/charge-conservation-law-stationary-current.jpg b/12.temporary_ins/15.electrokinetics/20.overview/charge-conservation-law-stationary-current.jpg
new file mode 100644
index 000000000..3a403e438
Binary files /dev/null and b/12.temporary_ins/15.electrokinetics/20.overview/charge-conservation-law-stationary-current.jpg differ