As shown in the picture, what does the sign on the left mean?

As shown in the picture, what does the sign on the left mean?undefined
Narrow bridge ahead, who arrives at the entrance of the bridge first goes first
Follow the principle of giving way, red arrow gives way to black arrow, after confirming there are no cars coming from the opposite direction, the vehicle with red arrow goes through
The vehicle with red arrow has priority to pass
Who has the bigger vehicle goes first

One-way give way sign: The smaller red arrow on your side indicates that the larger black arrow opposite signifies that vehicles on the other side have the right of way.