The forward was widely expected to leave the Emirates in the summer, with manager Arsene Wenger going on a rampage to ensure all the deadwood was disposed of before September 2.
However Chu-Young was one of the few who failed to earn a move away from the Emirates, much to the disappointment of his international coach.
“Park knows what he has to do,” said Myung-Bo.
“He must find a new team if he wants to remain in the national team.”
The forward has managed just six appearances for the Gunners since signing in 2011, and spent last season on loan at Celta Vigo.
The 28-year-old failed to show Arsenal fans what they were missing however, after struggling for goals in Spain, and was told he had no future at the Emirates upon his return.
Arsene Wenger is willing to tear up the forward’s contract and allow him to leave on a free, with Japanese side Urawa Red Diamonds keen to offer him an escape.
However the £5million forward has been unwilling to take the steps towards this happening so far, probably due to the fact he is on £45,000 a week at the Emirates.
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