I don’t know how to hide the traces, but there is a trace of a boat crossing on the duckweed on the water.
"If you don't understand the hidden traces, the duckweeds will bloom together" is a poem by Bai Juyi, a poet of the Tang Dynasty, in "On the Pond". The background of this sentence is that Bai Juyi was walking by the pond and saw a small boat rowing across the water, leaving a trace. Bai Juyi observed this trace and found that the traces on the duckweed were very obvious, indicating that the boat did not hide its traces, so he wrote this poem.