M'chaka cha 2011, kusintha kwakukulu kunachitika ku Siying. Pogwiritsa ntchito mababu a LED, diode ya SMD, ndi kupanga madalaivala otulutsa mpweya wotulutsa mpweya, kampaniyo imapanga kusintha kosintha. Kuphatikiza apo, amapeza bwino chilolezo cholowetsa ndi kutumiza kunja, kuwalola kuti azitumiza kunja...
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