Which situation can I use 操练 in and which situation 训练? I read on Baidu that one is used on a basic level and the other one contains the meaning of "developing" the content of something.
操练 - practice; drill; train
训练 - train; learn
操练 mostly refers to performing a set routine repeatedly and prolongedly
训练 is a more general term for 'to train'. While 操练(drill) can be a part of one's 训练(training), it doesn't include elements such as learning, studying, or observing as 训练 does
You can 训练 yourself in chess, but you cannot 操练 your chess skill because it is not a set routine.
We usually say 操练 martial art set (e.g. perform a Tai Chi set) because it is a set routine. The more you repeat, the better you get at it