Goodbyd means 再见 (zài'jiàn).Take care equal 保重 (bǎo'zhòng)，as someone really want you to be health and happy.By the way there are many meanings.I just translate as the good and common meaning.

GOODBYE：再见 TAKE CARE：保重（formal occasion ,if you can't see each other in long time） 路上小心/慢走（lardgely used in daily life）

GOODBYE 再见 TAKE CARE 保重（照顾好自己）

For Jackie,Dorayaki87 and tsurine thank you guys for the answers!