Works only after disassembling and reassembling

For a trip to China, the adapter has been procured. What others had also determined were the noses that it prevented that you could plug into the socket a plug at all. With a cylinder mills these were quickly removed. Once you could now insert a Schuko plug, I realized that none of the rotational positions of a contact was to produce (ohm meter). After disassembly of the adapter (Note: special screws) I found that the contact plates were mounted in the wrong adapter and therefore could not touch the sliding contacts of the connector. After correct installation of the current-carrying plates (click into the notches) and assembly work of the adapter as desired.
Conclusion: Although the adapter is quite cheap, you should bring some tools and technical skills to use the adapter can. Therefore, only 2 stars.